Conroe uses couple of diffrent technologies that are better than the FX-60's / 62's.
Heres a couple:
A. Conroe uses a 65nano meter technology whilst the FX-60/62 uses a 90 Nano meter technology [This is the size of the transistors, the smaller means more transistors producing less heat and generating more power while consuming less power, and also its cheaper to product
B. Conroe uses a technology called "Shared Cache" Which is basically means there is one, HUGE cache for both [or in future chips (quad) - all] cores, allowing the cores work better together [and some other stuff which im really lazy to explain, google shared L2 cache or something]
That is just TWO of the major diffrences that are giving conroe a lead over any AMD chip out there nowdays.