Interface, usability and features fit for my needs, that's all the benefits I need.

Features I like for my clients are

• simplified, but decently designed UI
• setting to show uncropped images/videos in posts and comment view
• dark mode (adaptive colors syncing with device theme and color palette are a nice to have, but not mandatory)
• shortcuts to formatting options in Editor (list, bold, italic, code, citation, etc.)
• color setting to highlight OP or self in comments, links and other stuff for better information parsing
• feature to easily minimize comment threads

Sure there are a few that satisfy some or all of these, but you have to take into account personal taste as well. No one will buy a banana with perfect nutritional values, when it tastes like tobacco.

There isn't a one-fits-all solution, just try them out and stick with what fits you best.

For now I completed the client speedrun and chose Sync, but I'll give Boost a try when it releases, since I used them before, but as soon as Infinity hits the store, I'll probably return to that, Docile Alligator created the perfect mix of simplicity, usability and visibility for me.