I think level as something to do with it. But there could be many reason to why it sounds better, D/A converter, variable types, etc., it's really hard to tell what does the big difference.
I just think that Axoloti is not that well suited for bassy sounds, like bass, kick drums etc. So I thought I'd get something with more kick to it, no pun intended
I did have a Digitakt at some point, yes, but I sold it again pretty fast. Also had an Octatrack before that, which I also sold again. They were cool, but just not what I was looking for, I wanted something that also had a sound engine, not only sampling. And this has both, so for now I am pretty content