Hmm yeah you are always going to get some degree of differing latency between devices I guess. Do you still get the same issue when master clocked from one of the Elektron devices? Modern computers are notorious for having quite poor MIDI timing which can result in an unstable clock, I ended up using my Digitone via OB to get a stable clock source without buying more hardware (see Overbridge makes a great MIDI clock source)
If the degree of offset is constant I guess nudging MIDI timing might work… I guess I’d be tempted to try to look at creative workarounds that don’t involve two devices playing a kick at the same time as it sounds simpler, haha