@djst thank you for the thoughtful rundown on these two boxes. It was a good read.
I would be so interested to see what you made of an op-z. Did you ever try one?
I’m not trying to convert you, but it is ultraportable, great sequencer, plenty of tracks, decent polyphony, blah blah blah. However the synth engines are pretty weak so thankfully it can sample (into its limited memory).
I say that because I was initially split between an op-z and 101, and still contemplate getting a 101. And secondly, I have wondered if the Syntakt is like a big brother of the op-z. Perhaps the op-z is the worst/best of both worlds 
I’m just a hobbyist and don’t have much time for music making so sometimes think the immediacy of sounds and portability from the 101 would be a good fit, but this thread isn’t about me 