but my main needs are not really discussed

…

So in essence i need something stable that is relatively easy to use and has great ue5 and gaming perf.

That is probably the most common set of requirements people ask for. In reality, with a few exceptions, there is really not that much difference between distros given those requirements. UE5 is newer so the biggest change there would be that you might find distros that ship newer versions of stuff might run it slightly better then distros that ship older software. In practice I think it has been out for long enough that you wont see much difference unless you want to play something new on the day of release (but these days those are all buggy messes anyway… not sure your choice of distro will make as big a difference as waiting a few weeks/months for the initial patches to rollout).

Remember, all distros are essentially based off the same software, the biggest difference being what desktop environment they ship with and what versions of software there ship (and how how long they stay on that version). By far the biggest difference you will see if what desktop environment they use and all distros essentially package the same set of desktop environments - each might come with different ones by default but they typically contain all the popular ones in their repos.

i need something stable… great gaming perf

In particular these two points. Do you know what you are asking for here? These are the most bland and wishy washy requirements. Everyone wants something stable and fast, never seen anyone ask for something that crashes all the time and is slow. But worst these tend to be on the opposite ends of the spectrum in terms of requirements, if you optimize for one you tend to trade off the other.

Even stability has multiple meanings. In terms of crash stability you will find all distros to be about the same. No one distro wants to ship buggy crashy software. But at times they do. And it is really just the luck of the draw as to when this might happen to you based on what software you use, how you configure your system and what hardware you have. Some combinations just don’t work for some weird reason and you wont know until you hit it. This is why you hear some people claim one distro is a buggy mess while some other one is rock solid while someone else argues the exact opposite. All main stream distros are just as good as any other in terms of this and you are just unlucky if you ever do run into that type of issue. The biggest problems in this regard tends to be when a new major version of something comes out - but like with gaming it can be beneficial to wait a few months for any issues to be patched before jumping to the latest big distro version.

The other side of stability is API stability - or the lack of things changing over time as new versions of stuff get released. There are two main types of distros in this regard, point release distros which freeze major versions of packages between their major releases so you wont get any new features during the release cycle that version of the distro. Then you have to deal with all the breaking changes from newer versions of software once every so often when a new distro version comes out. Vs rolling release distros that upgrade major versions constantly and so generally follow a lot closer to the latest versions of things than point release distros. Really the big trade off here is not if you encounter breaking changes.

Any distro will need to deal with them at some point, the choice is how often you deal with them. You can wait years on the same version of a point release distro and only need to deal with all the breaking changes once every few years, or once every 6 months. Or you can deal with things as they come out with a rolling release distro. But while it might sound nice to only deal with it every few years it also means you need to deal with all the changes at once. Which can be much more disruptive when you do decide to. Quite often I find the slower upgrading distros are better off with just a full reinstall on the latest version than upgrading from one to the next. Personally I prefer dealing with small things frequently as they tend to be easier to fix and less disruptive over longer periods of time. When I was running kubuntu I used to end up reinstalling it ever 6 months as the upgrades never worked for me (though this was a long time ago), but my oldest arch install lasted probably probably 5-10 years or so.

And at the same time how frequently you get the latest versions of things means you get any performance optimizations and support for newer hardware or newer games as well. But also any bugs or regressions. It is a double edged sword. Which is why stability and performance tend to be a leaver you can tune between rather than two separate things to can achieve. Just like overclocking, the more performance you can get out of a system tends to result in the system becoming less stable overall. Everyone wants the most stable and fastest system, but in reality everyone has a different limit on how much or what types of stability they are willing to give up on to achieve different levels of performance.

But out the box, you will find most distros to be very much within a couple of % of each other and which is fastest will vary depending on which games you want to play and what hardware you have. But they all tend to have quite a bit of head room to optimizes for specific use cases as they all are optimizing for the general use case which is typically just trading off performance in one thing for another. But again, we are talking about tiny difference overall.