Just judging from the highlights of Bento, he really has the potential to go to Allison's level or more.
Di Gregorio is good, but judging from full matches and highlights, one of the reasons his stats are so good has to do with the shots he dealt with, like he is well protected that he can be well prepared for the shots, which sucks cause he is going to be a beast for Jube.
However, if you are looking for a GK to bail our ass when we have brain farts or the opponent has an exemptional attempt (think of Sommers when he bailed us out), Di Gregorio doesn't seem to have those traits, but in terms of other things he is rock solid.
Basically a GK that can change the game outcome.