I have both Hermod and 4BR. I use a combination of 4BR and 2x Dnipro DOT for all my core rhythms, and Hermod for everything else.
I’m not sure how others use Hermod, but I’ve personally found it to be really insufficient for doing any kind of drum looping or manipulation, because it has no way of being able to mute/delete/manage all the notes with the same pitch value (like you’d have with drums) on a track. Like, if I wanted to take a beat and then re-record JUST the kick drum, it just wouldn’t be possible. I’d have to erase and re-record the whole track.
4BR lets you do that, and quite well, I might add! My only gripe with 4BR is that you can’t hook it up to a computer to manage your drum patterns. You have to do all the programming entirely in-unit. Which is fine, but having some kind of SD card or USB port with MIDI files (or similar) would be amazing, because I’m not the best finger drummer and would like to create some high-resolution patterns I know I’ll never be able to play in-unit.
That said, of all the sequencers I’ve used, Hermod has been by far the most immediate and fun. Once I have the drums going, I can very easily record some chords, a bass line, melody, whatever. I can delete any track and re-record easily. I can duplicate the entire sequence, tweak it, and then go back to the original.
I use them both in all my YouTube videos and on my weekly Twitch stream. If you pop by the stream sometime, I’m happy to show you how they work