I have both currently. I like that with the Octatrack I can apply EQ and master filter on the octa because the MIX slot is limited on Tonverk (only one effect).
And yes, the octatrack is better suited for live FX with the four outs you can route tonverk drums and melodic on separate stereo pairs and process them separately then master track on octa for final EQ/Filter etc as mentioned. So Octa becomes a nice processor for it.
And of course you have the ability for live FX performance stuff as well.
However I will say Tonverk has bus Punch in FX which get you pretty far, and if they add a second slot to the MIX track and add an EQ you can do a lot with that. It’s more QOL stuff they need to add. Page loop on TV, timestretch, wavetable synth, and hell a looper would be nice. Imagine a looper machine that loads a subtrack and allows you to capture loops to each of the 8 subtracks and turn them on and off etc.
But as of now none of that exists so octatrack is the best pairing in the elektron ecosystem to fill that gap.
If they add overbridge then tonverk will be an insane DAW companion. Process all your 8 tracks out separately into ableton with fx and stuff there? Use ableton to route master out to some other device or do live master fx in ableton? 8 inputs INTO tonverk with live FX applied?
If they add that type of stuff I could see how this becomes the true octatrack mk3 successor. But I don’t think they will, only the small additions will be made.
I see synthstrom deluge as finished version of what tonverk could be. It has synths, not just wavetable. It has a looper. It has live performance FX on the main mix. It has a battery built in. It can record stems for all tracks. Tonverk has better FX routing but otherwise I am questioning my purchase in comparison to deluge especially given some of the omissions I mentioned.