> Enterprise customers don't care about brands.
Sure they do. That's where the saying "nobody ever got fired for buying IBM" comes from. If anything enterprise is more brand sensitive and less price sensitive than retail customers.
Not to mention there is the entire surrounding ecosystem from the CPU parts themselves. The chipsets, boards, laptop availabiilty. Not to mention things like vendor lock in to the particular out of band management technology. Getting better benchmark scores and saving a few hundred per CPU is only part of a much larger matrix for making a purchasing decision.