its the smaller one, the only difference is how the numbers are stamped. The snout bearings have them stamped on one side of the inner race and on the opposite side of the outer race, but the rotor bearings have them stamped on the same side on both races. The seals for them have a metal case with a rubber lip. One was red and one was blue I think(who knows why), not sure if I have one loose somewhere.
When you press the center rotor bearings out, you will ruin some of the case surrounding the bearings(I thnk they might be installed that way to help retain them, with heating/cooling pieces at the factory), plus if the rotors themselves arent pressed back exactly in the same poosition(within say a thousandth or so) and to the original shaft, the rotor lobes will touch. I dont see how its posible without some jig to press them in without contacting, never tried it, since those bearings/seals almost never fail(well I havent seen them fail yet) even on 2 blowers that have self destructed