I have a couple MG2's, a Centurion, and a Manners EH1.
MG2 is probably closer to the Manners than the Centurion is. The MG2 and Manners have a bit of angle to the grip which for me affects the angle my wrist wants to sit when shooting positional. The Centurion is more vertical, and has a closer grip to trigger relationship - it's a bit different of a hand position. The EH1 is slightly fatter than the MG2, feels thicker horizontally. From recollection the standard Centurion shares that "wider" feeling along with the vertical grip (my Centurion is not standard width).
I came to Foundation after several years of shooting an MPA chassis. Going to the MG2 was a bit of an adjustment since I was so used to the vertical grip, at that point I bet that a Centurion would have felt more "normal". After a few months and a few matches I got used to the MG2 and now it feels normal rather than the vertical grip.
I shoot the MG2 as my primary competition rifle, my daughter shoots the Centurion and likes the more compact grip-to-trigger relationship because of her smaller hands. Her Centurion is also modified to be narrower width wise, for the same reason.