Oda didn't have GV planned out all that well in the Kuma flashback.
-Clash between Roger and Rocks that never happened.
-Kaido wanting to fight Roger, but never really bringing it up this flashback.
-WB is much more antagonistic towards Rocks in the old flashback, and gets mad at him for trying to give him orders.
-Garling being called a dominating/relevant figure in GV.