Even if the new Cummins Badge and the Hemi badge are in the same place you should be able to tell them apart pretty easy by the exhaust pipe alone, (and I'm hoping sound as well!) Also, unlike the Found On Road Dead badges which were both V8's, these badges will be more distinctive. But I think the real problem is telling a 3500SRW and 2500 apart, especially if the owner removes those badges! Just my $0. 02!
-Brandon