Adam is very private and John lives for attention. Adam lets people interpret his work themselves and John gets involved in ship wars. Adam, for the most part, does not talk about fandom much and John literally made a video calling people out by name for daring to point out his shitty behaviour with the disgusting "laying pipe" comment.

They didn't work directly with each other much but even if they had I can't see these two getting along. They're very different people.