My approach is sort of the opposite: I do most sequencing on a Digitakt, while the OT serves as a mixer / fx (DT uses a THRU machine + a NEI machine on tracks 1 & 2); I have a buffer for transition looping on track 4 (since it’s the closest to the YES button, so I can press T4+YES single-handedly to activate a one-shot trigger to start recording the loop).
Tracks 5, 6 and 7 are dedicated to playing stereo loops (although I’m trying to keep that to a minimum - 1 or 2 loops, T5 y T6 ideally).
I think that for drum machine sequencing purposes, the Digitakt sounds/feels great, specially once you build muscle memory for some of the more jam/improvisation-oriented features (control+all, reload a specific sound/page, delay and reverb parameters, pattern mutes, etc).
Also, I feel like the envelopes and the filter are much more musical and responsive than those on the OT.
Haven’t used a Model:Samples but at least from the videos I’ve seen online, I do feel like it sounds weaker than a DT. I know it’s a lot cheaper as well so…
As I’ve mentioned in another thread, I’m getting more and more comfortable with my DT+OT setup. I was using a FaderFox UC4 as well, to have quick access to some parameters… but I’m getting used to not using it, plus it also forces me to focus on less things, and make track less busy/complicated.