I think they're representatives of two different approaches. Just like Brunelleschi or Bramante did regarding ancient art, Adywan aims to restore the current movies to their former glory and shining.
Angel, on the other hand, like Bernini or Borromini, while respecting the ancient language and syntax of architecture, allows himself some permissions that wouldn't have place in a more objective view, like Adywan has. I think that in part is the main reason for them not working together, or at least not working completely together, because in the end each other's work is rather famous within this community to be in vox populi, just like now.
I have always had more personal contact with Angel since I'm not so fond of the infalibility of the OT; and with Vaderios it's always an open discussion about what (in terms of script, story, and mainly visuals) could be done to fix it, although he's not so open to discussion on technical aspects, because he's a speciallist in image treatment, and he already knows the answer when you are just starting to ask. Ady instead already has the idea on his head, and the discussion is likely to go on the field of how to do it, as you can check on his thread, it's more about framerates, compression rates, compositing, and technical aspects, precisely because the idea of the edit never comes to question. But I want this to be clear, the revisited saga is not just "better than nothing", it's a bit more than that.
Probably the results, in terms of richness and impoluteness of Ady's and Angel's work would be similar or not-so-different, but in the end it's their two different creative processes what adds value to each of them. I feel enormous respect for both of them and their work (I think the Bramante-Borromini comparison said it all, hah)
I also feel extremely curious about PT:R, for Ady won't have a precise horizon as he has now when he puts an aim to the OT:R saying "the special editions as they should have been". Of course, he'll still have the premise, "prequels will match the OT and not vice-versa", but as you can imagine the freedom margin is quite huge to make almost everything he wants to improve those horrible movies. And that will be where his MO will change or at least be set to revision; as previously said, I wait to see what comes out of it.
Greetings!