You are asking kind of a loaded question. I can speak a little about Colburn's, I have seen a couple calves from Primo on clubby cows and it worked, but each cow will work different with a different bull. Both breeders first priority is producing quality Angus so if their bulls work with a clubby cow it is a bonus. I have an Alias cow I will be breeding to Primo, I will hopefully let you know next year. The three bulls Colburn's list are all out of the same cow, and she is a Style. The cow is great, her calves are great, their calves are great, the heifer that the young lady we are sponsoring is showing is out of a daughter of the cow, she is flat out good.
Either breeder has bulls that will work, just depends on your cows and your goals, you can try both and see.