[alpacassei]

As well as what Mangoandmimi said, depending on whether they have more Winter White or Campbells genes, they’ll vary in size anyway. Winter Whites are usually “chubbier” whereas Campbells are more “slender”. Hybrids can have any combination of the genes so as long as you can be sure they’re both eating properly and there’s no underlying health issues or problems with food agression, I wouldn’t worry.

Your hamsters weights are almost identical to a past pair I had, they ended up being seperated later on but their weights stayed the same.