the only two issues I am aware of are:
BCC tend to get bigger than BCI, so you need to be ready for that

and the big reason:
BCC are much more prone to digestive issues, especially when young.

so with a BCC (or BCA, which I have) you need to take extra measures to prevent regurgitation and impaction. This means having the discipline to feed smaller meals, not handle for 5 days after each meal, and not feed unless you've gotten a poop since last meal (when older you can go two meals between poops)

It's not difficult, just takes a little more attention.