I have no experience of APR, their maps could well be better than Revo, but I dont think Revo will take it lying down, their new Stage 2+ map may well be as a fightback against the surge of APR popularity.
I think a lot of it comes down to your local trusted tuner. If the person I trust to do all the work on my car ditched Revo for APR I would probably trust his judgment, just as people who swear by JKM, Statlllers, PDT would even though part of the reason could be a financial carrot waved at the tuner in question.
You can still only push the TFSI so far before it goes pop regardless of which map you have so we may as well all agree that the re map is still best bang for buck regardless of which one you have