I has this debate and narrowed it to the XF, Thompson and Lev as I like the infinite adjustment. The early XFs got panned for a crap seat clamp which was apparently fixed about three model years ago.
I discounted the XF because I hate the remote.
In the end, I talked myself into buying a different frame to fit 31.6 and take a reverb as I was balking at £300 for a seat post.
Things escalated and I ended up with a nice new Soul 275 in place of old mk2 Soul. Ironically with a lightly used Lev.
If I was choosing externally touted droppers, Lev or Thompson, I’d go Lev simply for the cable routing. It’s so nice having the cable terminate at the frame. Similarly I’d choose the Lev over a Reverb as the loop of hose bugs me.
Internal routing hasn’t got as far as me yet.