To be honest I cannot really tell if one is better than the other at their jobs because I have no idea what their responsiblities are (or were) and what decisions they take/took and which decisions they do/did not take. What I do know is that on the field we've been a slow-starting team since Joe Philbin became the head coach and this hasn't changed with Adam Gase. What I also know is that the offensive line has been a disaster since Philbin and it hasn't changed with Gase.
The question really is: what is it, the talent or coaching? I lean to the latter because for example, when I watch the Green Bay Packers without their top 5 offensive tackles against the Bears, they still score 5 TDs. Is it all Aaron Rodgers? But then, how do you explain that their screen game is working (i.e., the blocking is good) while ours has not worked in seemingly decades when Rodgers doesn't block? How is it that teams are able to neutralize Suh even when their starting RG goes down with an injury while we can't get the run game going nor do we pass protect properly even with our starting OL intact?