Thunder > Summit > Wefwef > Jerboa > connect
There is minor differences that each has. The best feature that I look for is swipe to upvote, compact view, thumbnails on left, clean inbox and messaging. Unfortunately due to the lag, anytime I post or want to save a post I go into the browser as none of the apps successfully post.
Yes it does. It's a hard setting for your Lemmy profile that is applied to your account, which effects your apps. Some apps allow you to change this in the settings.