Scale counts are the best way to tell but it's not an exact science:
BCC
scale counts - 75 to 95 dorsal rows
227 to 250 ventrals
49 to 62 subcaudals
BCI
scale counts - 56 to 79 dorsal rows
225 to 253 ventrals
47 to 65 subcaudals
I would hazard to say that's a BCC based on the peaks of the saddles and the redness of the tail, but I'm no expert