When it comes to games, nothing we tested with gave us visible differences - Crysis 2 isn't an exception. The performance on most tests was equal.
Like with Crysis 2, Metro 2033 doesn't use the extra threads an i7-3770K can supply. There is no real difference in performance between the two.
We get used to it - like with previous games, Hitman Absolution doesn't take advantage of the four extra threads, which results in identical performance.