I found some analog kicks and snares sound much better or complex on the A4 than the RYTM.
Especially snares, I was amazed at some of the snare sounds that thing can get.
As for which one sounds better, thats so subjective.
A soft tissue a little bit moisted ( no products - A4 currant off !! )
i only haead the rittem on internet but I like the sound. .
BUT >>> Better percussion or kicks — well you can load any sample you want in the Rittem - but in pure synthesis – i’m sure the A4 leaves the Rittem far behind;