Nighthawk AX12 Premier Beta includes a 90-day Free Trial?

So Netgear just launched RAX120 on Amazon for $499.99. I got my AX12 Premier Beta 2 weeks ago, end of March, after signing month-to-month option of paying 29.99 per month so I can opt out anytime - chose this having the plan in mind of returning the Beta version and buying the release version. I assume that the release version is more polished and has all the upgrades from the Beta. Correct me if I am wrong but I didn't see buy-out-clause in the contract for month-to-month subscription plan. I presumed that to be after paying for 12 months - which would be cheaper than buying the release version. I am not sure if it is worth to get RAX120 from Amazon, or keep the Beta version for about $100 less (presuming I can buy it out after paying 12 month installations). I need to do more research on my own, but what are some of the biggest differences between the Beta and release versions? If there is no significant difference I will consider keeping the Beta.