So De Zerbi is probably less stubborn and will establish a better bond with players but man, his Sassuolo can't defend to save their lives.
Attacking wise he's pretty much the closest to Sarri that you can get.
I saw him deploy 433 and 4231 mostly, not that those formations differ that much.
In the end if we fire Sarri to hire De Zerbi, my conclusions would be:
1. Sarri has lost the locker room and he got rejected by the players
2. Agnelli and co want to continue the revolution that goes from pragmatic to Pep-like attacking approach.