How old was Bishop when it happened? Dogs enamel thickens for the first couple years so timing may play into it as far as strength goes. RC'd tooth is dead so it won't be as strong, hard to say for sure. What did the vet tell you?
My explanation is crappy, going off my memory from having RC/crown done last June. There is a difference in the enamel of one yr old pup and a 3 yr old dog, may have been the hardness/thickness can't recall and I can't find the article to explain it, my apologies! Anyways, probably won't make much difference as long as the vet is ok with it.