Phenom II is not just a process revision of Phenom I.
Clock per clock ( better performance at the same frequency ) is nowhere to be found in almost every single core revision ever.
Core i7 920 C0 vs D0... clock both at the same frequency, and show me a difference in performance
Core 2 Quad Q6600 B3 vs G0... clock both at the same frequency and show me a difference
...etc