Albino Bristle nose vs normal ones.

[Squid]

Are the normal bristle nose and albino bristle nose a different variety of pleco? I have a female black one which ive had for a few years now its about 4-5 inches and i was able to get a male partner for her at the same size, i also have some albino one but they are only 3 inchers, i thought they were a different variety, but i saw aome albino bristlenose at the place where i got the male and they were also huge, and was told the albinos and the normal ones are same variety and they'll interbreed?
Was shocked to see the huge albinos from the source where i get the normal ones. i thought the albinos did not grow that big.