Having compared snaps in ubuntu 23.10 to flatpaks on opensuse tumbleweed, I can safely say that snaps tend to be faster for me with less weirdness happening during usage. Some programs were the same (obsidian for example) other comparisons were done from the same category (Firefox snap vs chromium flatpak). I genuinely prefer snap and don't see the issues people often quote. Also, that the backend isn't open isn't a big deal to me, as snaps themselves generally still are.