Yeah I'm waiting for Boost and Sync to become available, but I gotta say that Connect has shaped up real nice a lot faster than I would've expected. Who knows, I might end up sticking with it.
Mlem: missing a lot of features but the ones that they have work very well. This one feels the most native because it is. This is my current choice because it is actually native and open source. That icon is ugly as hell, though.
Voyager: this one is a month ahead on features of ALL other lemmy apps. this one is the most feature-rich in that they have the ability to edit posts and do all kinds of other stuff. The non-native web app aspect causes it to lose LOTS of points in my book
Memmy: this one was easily my favorite but the recent updates have started to show how poorly architected it is. They have a TON of work to do under the hood to make this one feel solid again..and honestly, I sincerely think it may never feel as responsive and snappy because they made the strange decision to make an iOS only app in react native....
Liftoff: this one is pretty good but it just goes too far from the standard that Apollo set that I feel awkward in it.
Bean: this one is early days but already has some cool stuff that I wish other apps had (the profile button at the bottom has the icon from the currently signed-in user) I had been asking for that feature from other devs for FAR too long.
It seems that the reddit refugees who used/loved RIF are the ones who use Liftoff, as they are very visually similar. I fall into that group. Having never used Apollo, I don't have a comparison on that front.