My main reference point was a response Polyend gave to a question on their Instagram. Someone asked if the Tracker would have CV out; Polyend’s response was a link to the Poly2
The Poly2 is a really capable device. Between the TRS midi in/out you can most likely attach the Tracker.
You won’t have AS much CV capability as the nerdseq though. Nerdseq can do CV sampling, as well as receive triggers for forwarding steps/incoming clock and more. But, with the Polyend tracker/Poly2 combo you will have the opportunity of connecting multiple Midi devices at once, running the Tracker as an audio source and a CV source as well. For the falling and rising edge aspects that come with a Nerdseq, I’ve also got a teletype, so that closes the loop for me on the need.
But, honestly, it would be very strange for Polyend to develop the Tracker and the Poly2 and not have some basic interplay between the two. I would be surprised if they actually don’t add some extra functionality as a pair!