I use the OT when I want the OT sound, the MPC when I want MPC sound, etc. Not just the sonic signature but the entire workflow gives different pieces of gear different sounds.
Isn’t that kind of the point of using hardware in the 21st century?
EDIT: For me, th eOctatrack is unmatched for sample-orented improvisation but in almost 4 years I’ve never once created a finished track with it. The MPC2000xl isn’t that great for improvisation because there are too many important things that you can’t do without stopping the sequencer first, but for going from nothing to complete arrangement (either sample-based, MIDI sequenced or a combination) nothing else I’ve used in hardware or software comes close, I can sit down with no plan at all and have a finished track in somewhere between 2 and 6 hours depending on how complicated it is and how focused I am. A DAW usually takes 8-20 hours just to get to the point where I’m ready to start mixing. But the type of music I make in every case is totally different and the way I mix is totally different, so no one approach replaces the other two.
If I had to choose one it would still be a 90s MPC, some rack gear and a small mixer though. For me that’s the fastest and most inspiring.