You could but I would stick to the mega threads. People have the experience, they're just not always online.
Rolls is someone who recently went from PPT to buprenorphine. You can talk to him about it. He's posted in this mega thread.
If you want to talk to someone directly I'd PM Rolls. If you want to make a thread that's OK but it might eventually get merged, locked, or might even get flamed or not even answered either. Just so you know.
I would start with PMing Rolls, or anyone else in the PPT or Suboxone mega threads that have used both.
Best of luck. Let me know what you decide to do.