I'm using wefwef and I switched back and forth between wefwef, memmy and mlem.
Here are some things I considered:

• Inline images are shown in posts(instead of linked to at the end): mlem, wefwef
• Opening images and zooming them: memmy, wefwef
• saving images: memmy (Edit: wefwef too since on of the latest updates)
• Adjustable text size: memmy, wefwef
• compact view is actually compact: wefwef, mlem (Edit: memmy too since the latest update)
• jumping to comments from your inbox: wefwef , Memmy(kind of, shows comment chain of that specific post, but not highlights the comment and has no way of switching to all comments from there)
• edit comments: wefwef, memmy

As you can see, wefwef is present in all of these ^^ jumping to comment is a pretty big one for me, aswell as the inline images