Auto Race is B6000CA from 1977. Battlestar Galactica is B6001, B6100 is Football, B6101 is Baseball and B6102 is Gravity.

So I think you are correct that it is the same code! Thanks for checking.

I wonder if there are any functional differences between the CA and EA suffixes. I've got one Football that's labeled B6100EB and another that's labeled B6100-15.