this concerns both btrfs and zram, so this would be a huge boost?

eOS to lineageOS is like Ubuntu to Debian; a more newb-oriented solution with some stuff preinstalled but with less choices; e.g. you can’t switch out the iOS-like launcher. if you know your way around, you’re wasting your time with eOS. but if it’s for a less technically adept user, you might be doing them a favor with eOS. the murena suite can be opted out of.