Manny,
My personal results, while not with the 325, was with a non simulcast scanner, (BCD436), driving side by side with a SDS 100, from Somers to Ellington through Rockville and then down to Willimantic out Route 6 to Connecticut. The 436 (which is a fantastic receiver, BTW) missed about 1/4 of the stuff the SDS did. And sometimes the 436 would catch onto a TG after the SDS was already audible. In a few spots, both would be locked on, but the 436 would be digital garbage where the SDS was not. Only scanning CLMRN H, C, K and D simulcasts that covers the route I was on.
YMMV, but that was my personal experience with the two in a side by side mobile environment.