UFC 321 will see Tom Aspinall defend the Heavyweight Championship for the second time when he takes on Ciryl Gane in Abu Dhabi. Many sportsbooks will offer great odds for this clash, but finding them may be tricky. 

In this guide, I’ll explain what to look for in comparison sites, share my top picks, and show the scoring logic behind each rating.

How I Rate Comparison Sites

Choosing the right betting comparison site might be daunting, given the sheer number of choices. To make things easier, I will show you the key criteria I use to decide whether a site is worth visiting. Here they are:

• Credibility & Editorial Standards (25%): The site’s credibility is among the most important criteria that help me decide whether it’s worth my time. I check what others say about it, who is behind it, its editorial policy and fact-checking standards, and whether they have years of experience in the field.
•  Review Depth & Accuracy (20%): The second thing I check is how complete and accurate the reviews are, covering bonuses, terms, limits, banking, and KYC, and whether details match the operators’ T&Cs.
• Navigation/User Experience (20%): A good comparison site should have intuitive and efficient site navigation to get from A to B promptly. This accounts for 20% of my score.
•  MMA Coverage (20%): If I’m betting on the UFC, I only want to be recommended to sportsbooks that offer betting on mixed martial arts. I don’t want to read a lengthy review and then discover that it is an unavailable market. This accounts for 20% of my score.
•  Freshness / Update Cadence (15%): I also look at how recently pages were updated, whether changes are time-stamped, and how quickly the site reflects market or regulatory updates.

Methodology & Scale

We rate each comparison site on a 0–10 scale and compute a weighted overall score using the following criteria:

Weights applied to every site: Credibility & Editorial Standards (25%), Review Depth & Accuracy (20%), User Experience/Navigation (20%), UFC/MMA Coverage (20%), Freshness/Update Cadence (15%). Overall score = (C×0.25) + (RD×0.20) + (UX×0.20) + (MMA×0.20) + (F×0.15).

Top Comparison UFC 321 Sites

1. BetKiwi: Best Overall (9.3/10)

One of my favourite sites for finding sports betting platforms for UFC 321 is BetKiwi. The platform offers an extensive section of sportsbooks with competitive odds. Another thing worth mentioning is how BetKiwi presents different, simple, and effective sportsbooks. Within seconds, I could see the features that make up a sportsbook, such as live betting and available payment methods. 

BetKiwi’s reviews leave nothing to the imagination. They tell me everything I need about a specific site: bonuses, support, betting markets and lines. These reviews are written by a team of industry experts with a passion for sports and sports betting, enabling me to confide in them instantly.

Scorecard: Credibility & Editorial Standards 9.4/10 | Review Depth & Accuracy 9.6/10 | User Experience 9.8/10 | UFC/MMA Coverage 8.4/10 | Freshness 9.2/10 → Overall (weighted) 9.4/10.

Why it ranks here: Strong information architecture and at-a-glance toplists minimise the time to shortlist books, while long-form reviews cover bonuses, lines, banking and support in depth. UFC coverage is present, but could be more centralised for fight-week shoppers.

How Could BetKiwi Improve: An area that could be improved upon is adding a section in the sportsbook section for the best combat sports betting sites. Last year, 22% of the country’s adult population bet on sports, and as the UFC is only gaining in popularity with each passing day, it would be a welcome addition to the site by adding its designated spot.

2. SportsHandle: Most Options (8.6/10)

If you’re looking for a site that offers variety, SportsHandle may be for you. However, the site doesn’t go into incredible detail when discussing the platforms it recommends, like BetKiwi.

SportsHandle is also easy, as the site has been designed efficiently. Menus are quick to respond, and all of the information about the sportsbooks is on one page. It is also clear that the people pushing out the content at SportsHandle know a thing or two about sports betting, as information is constantly being updated to reflect new changes on the site and the industry.

Scorecard: Credibility & Editorial Standards 9.0/10 | Review Depth & Accuracy 8.0/10 | User Experience 9.2/10 | UFC/MMA Coverage 8.0/10 | Freshness 8.8/10 → Overall (weighted) 8.7/10.

Why it ranks here: Excellent breadth and fast scanning; depth is intentionally concise. Good for shortlisting multiple legal books quickly before drilling into long-form reviews elsewhere.

What Can SportsHandle Do Better: Although having all the information I needed on one page is nice, SportsHandle did feel a bit convoluted. A wiser idea would be to present mini reviews about the site, with an option to click a link that redirects readers to a more fleshed-out article. This would give users a better understanding of the sportsbook they are looking at, not just a condensed version on a single page.

3. BettingUSA: BettingUSA, Most In-Depth  (8.7/10)

This sports betting comparison site may not have the easiest platform to navigate, the depth of their reviews makes up for it. BettingUSA writes in a way that gets all of the information across, but not in a way that is overbearing, especially as its reviews cover multiple pages.

There is also a lot of variety at BettingUSA. Instead of just seeing the big players in the industry, BettingUSA suggests lesser-known sportsbook platforms. 

Scorecard: Credibility & Editorial Standards 8.8/10 | Review Depth & Accuracy 9.8/10 | User Experience 7.6/10 | UFC/MMA Coverage 8.2/10 | Freshness 9.0/10 → Overall (weighted) 8.7/10.

Why it ranks here: Depth is the standout; navigation can slow newcomers. Ideal when you want to verify terms (rollover, market rules) before staking on UFC 321.

What areas should BettingUSA work on: My main gripe with the site is its site navigation. It’s quite a mission to find the sites they recommend, and I had to scroll quite far down the page to find this information. It would be much better suited at the top of the page, so bettors can find the suggestions a lot easier.

4. Legal Sports Resort: Best For UFC Specific Sites (8.9/10)

Another comparison site I frequent for UFC betting sites is Legal Sports Report. It has its own dedicated page for the best UFC sportsbooks making finding a place to make your next bet as easy as possible.

Legal Sports Report is simple to use and lists all of the key information about a sportsbook in clear, succinct bullet points. It even summarizes the top sportsbooks within the country in a short sentence, which helped me determine with ease which site I wanted to use.

Scorecard: Credibility & Editorial Standards 9.6/10 | Review Depth & Accuracy 8.2/10 | User Experience 8.6/10 | UFC/MMA Coverage 8.6/10 | Freshness 9.2/10 → Overall (weighted) 8.7/10.

Why It Ranks Here: Strong editorial credibility and a clearly labeled UFC page. Bullet-point format favors quick takeaways; some reviews could expand on limits/KYC details.

How Could Legal Sports Report Get Better?

Despite Legal Sports Report doing a good job of condensing key information down into clear bullet points, I do think the writers could go into a bit more detail about the sportsbooks it features. This would then prep me with all the information I need to know before UFC 321 rolls in.

5. Fox Sports: Fox Sports, Most Credible (8.8/10)

One site I like to visit before placing bets on the UFC is Fox Sports. The site has some viable suggestions that clearly list the positives and negatives of the sportsbooks it recommends. As one of the leading sports networks in the US, I knew that the information present on the site was accurate and current, allowing me to avoid going into the sportsbooks themselves to fact check anything.

What I also liked was the suggestions for platforms in specific areas, such as the best app for cellphone users. This gave me a quick rundown on what the best things are about the sportsbook it is recommending me.

Scorecard: Credibility & Editorial Standards 9.8/10 | Review Depth & Accuracy 8.0/10 | User Experience 8.4/10 | UFC/MMA Coverage 8.2/10 | Freshness 9.4/10 → Overall (weighted) 8.6/10.

Why It Ranks Here: Mainstream newsroom credibility and timely updates are strengths; breadth of book coverage is narrower than specialist sites, and pages can be long.

What Should Fox Sports Do to Improve: One thing that Fox Sports could do better is tidy up the suggestions page a little bit

Which Is the Best Comparison Site for Finding the Best Sportsbook To Place a Bet on UFC 321: Aspinall vs. Gane?

BetKiwi finishes first in my testing, largely because it combines fast, clean navigation with genuinely detailed reviews, so you can shortlist quickly and still drill into bonuses, markets, and banking without hunting around. The breadth of sportsbooks is strong, and the layout keeps friction low from page to page. Aspinall defending his championship against Gane will be a fight for the ages, so make sure you are clued up about the best sportsbooks before placing a wager. 

Where do the others shine?

The rubric results back that up: BetKiwi posts the highest weighted score overall on UX and depth. SportsHandle excels for breadth and quick scanning when you need a rapid longlist. BettingUSA is the go-to for deep verification of terms and market rules. Legal Sports Report offers a straightforward UFC landing page that’s easy to orient around, and Fox Sports adds mainstream editorial rigor and timely updates.