What do the differences between Intel processors mean - T6600 & i5-540M?

Ok im uming your looking at these on a laptop right? Because the 540M is for laptops, "M" meaning mobile. Both these processors are quite powerful. And both are dual core processors which is very important. Im having a hard time finding a direct benchmark to perfectly compare the two, but im pretty sure I5-540m is a muchhh better processor, and since its designed to be mobile its probably a little more power efficient. Also FSB = Front Side Bus ,the higher the better.