Well I got them at separate places. Well its more like my brothers got them I have to take care of them. Anyways the three week one was fed with fuzzy rat and that one is bigger than the 6 week one, so I am guessing the 6 week was fed with pinky rat or mice. Anyways my main question was fuzzy or pinky.
I think they will be fine together because the case is 160 gallon that I made and it is awfully big. It has warm side on each end and cool side in middle. Anyways I could easily insert a barricade in the middle, I think even the tank divided in half will be big enough for each one of them until the grow till adult.