This is the same kind of nonsense why they got away with selling 500mhz PIII's with 128mb ram in supermarkets in the late 90's and people would go "oh see, this has 500 of something while the one over there has 300 of the same, so obviously this must be better.
The only reason hardware companies even bother to tell you how much mhz their chips have is because people are still easily impressed with numbers. They might as well tell you fsb frequency or multiplicator. It's a useless number. Even more so if you compare it to another device which has a completely different OS.
All that matters is how well it works.