I'm not answering OP's question with this, nor I'm looking forward to suggesting you to take any of these exams, but this is what I got in DELF B2 and TCFQ (I took both of them the same week), I actually was feeling much better the day I took TCF's Expression orale than when I had my DELF B2 interview, so IMO it had a strong impact on my results:
DELF B2
TCFQ