My heart would not be in it. Due to the fact he's a known biter and if I wasn't actively looking for another dck for the summer it wouldn't be that important to me to fill the spot. I do agree that kid dynamics change from one environment to another but if you're already dealing with 1 little guy that's challenging, why add another possible one? Are you going to take him for a trial day to see how it goes? A day might tell you if he won't work out but one day might not show you his biting habit. Who knows.
Some thoughts might depend on why your current dcb bites, does he need a playmate to run around outside with? Is he the only boy, does he need extra attention, is he going through the terrible 2's, etc.? And same questions for this potential dcb. Does he only bite at his current preschool and how often has it happened?
Good luck with your decision!!