But why did jonnyc go from revo to APR?
....I think that major modders like Jonny (and Hurdy on here) will go to the first tuner who offers a remap suitable for their project, providing of course that they have confidence in that tuner.
Jonny can answer for himself of course, but he is a professional racing driver with a public profile and, as such, will be offered free products by many aftermarket suppliers or remaps or otherwise. He is also valuable as a pre public release tester and the reward is free product. Nothing wrong with that, IMO.
According to which car that Jonny is driving, I expect that he would happily recommend either APR or Revo - Both tuners are well established, highly reputable, and know what they are doing.