There are countless of QOL features. You can customise all the app's colours, there's a bunch of different view types for posts and you can set default views per community, you can favourite communities, select and copy on a comment, search through comments, highlight comments of the same user, ... and much more! Most importantly there are a ton of settings you can toggle. If you can see it you can likely tweak it or hide it. It takes a while to change everything to your liking, but I think it's worth it.

Not sure what features it has that Liftoff doesn't (though it packs a bunch). But for me the selling point is the pretty and efficient user interface. All the gestures and buttons feel natural and intuitive, media rendering is smooth etc.