Two ball pythons housed together isn't a great idea for all the reasons already listed. As well two unsexed snakes is just asking for trouble with unplanned matings, possibly mating too young (if the smaller one is a young female and the larger one a mature male snake). Remember too, if one snake gets sick when housed communally, you've just doubled your vet bill and believe me herp vets cost enough without making that bill larger than it has to be.

For the snakes and for yourself, it's far easier in the long run to house them seperately.