I'd say the best way to look at it is if you're enjoying your experience over on Lemmy, then there's absolutely nothing wrong with sticking with it! c: This is one of the major upsides to federation, since different places can appeal to different wants or needs from their users!

That said, if you are curious about Kbin and wanna learn more about it, don't be afraid to! The extra toggles or buttons can certainly be intimidating at first when you aren't sure what they do. But in my opinion, one of the biggest draws for a website is having options! There's a whole lot of good in a site that lets you make your experience more your own than simply being one-size-fits-all, and Kbin certainly offers that in a few different ways! I can't speak for Lemmy on that front, but maybe they have similar options as well.

Apologies for the rather lengthy reply, but if you're still curious about Kbin and some of its functionality, there is this post https://kbin.social/m/kbinMeta/t/52838/A-starting-guide-to-kbin-social-support-thread-for-new-users over on the KbinMeta magazine. It is a smidgen dated though since there have been some updates since, so if you still have questions or are still confused by something on here, don't be afraid to ask! People are very helpful on here c: