Mo30 Wishbone/control Arm

Can anybody help,i have been told that there is no difference between a MO30 front wishbone/control arm AND A Standard one except that the bush is different,can any1 confirm or deny this.i have too buy one and it would be cheaper too purchase a standard one and change the bush than buy a MO30 one.my car is a 1988 944 turbo with mo30 suspension.

My understanding is that they are the same with exception that the MO30 has 2 ears on the front of the control arm for the brake cooling scoops.