So do I (except that I use a DigiTone). I have tried OT as a master, but I found the way it handles PC’s, and Bank Changes, as well as CC’s when those are needed to change banks and programs/patterns on external gear, pretty complicated and quite unpredictable. The DN handles that in a more predictable way. And it has BPM per pattern as well. Some say that OT doesn’t sample well when slaved, but I didn’t notice any issue. I don’t use PickUp Machines, I got mad at that undefeatable automatic tempo adjustment: can be very funny when rehearsing but not so much in front of an audience. With Flex machines I have no problem at all (yet).
I watched a talk between @Dataline and BoBeat the other day, where Cenk said he used the DN as master for his set-up for the same reasons, particularly the BPM per pattern (I believe it was that talk…now I’m not so sure but well…)