Based on architecture alone, it's much faster, assuming the Q6600 isn't extremely highly overclocked. About the only thing the Q6600 would have a chance in is things that can make use of the extra two real cores.
And there's really not much difference between the i5m's and i7m's. 1MB more cache and higher clock speed for the i7m is about it.
Now, the i7qm is a different story. That's a true quad with HT (like the desktop parts).