This is pure sales politics at its best. The IT industry depends and thrives on situations like this - stealing customers away by convincing them they'll save money with [brand] hardware and making huge profits in the process. Trust me, Sun will do the exact same thing to Dell at some other account. However, based on Sun’s current market performance, they better hurry up and do it! ;)

As for which server is better, I'll just plagiarize an old martial arts axiom, "There are no superior servers. There are only superior server admins."