I needed to find some mufflers for a set I bought recently. The round mufflers seems set for the toms. The dual pad seemed for the snare. Not absolute, but based on info I did come across.FYI - If you do not find a chrome rod (I have not) for the bass drum cymbal rod, I will be using a 5/16" stainless rod from hardware store. Local store had one when Home Depot did not. Also on Amazon if desperate. Found 3' rod and cut to length, though might find a 2' in some places.
I checked my mufflers amd my toms have round mufflers, and the snare has the dual pad. That is consistent with what you were seeing elsewhere.