I wouldnt think it is a problem, they might have cool babies.
but then I am not sure why you would want to because they would look different. I prefer two similar looking clowns. I have 2 of rod's onyx.
It had crossed my mind when i was reading on the forums but was actually just asking out of curiousity... sometimes i learn more on the forums then i do in college haha. thanks guys
they should be fine! i have a BW clown and a OW clown in the same tank the i used a little critcket cage for a refugium for the BW clwn to get used to the OW clown. they get along grea now!