Well they will have a higher FSB initially so it will be faster at stock, however yes you can take a C2D which is 266 and up it to 333 and way beyond making the real FSB 1333+ which would then be the same chip. If they overclock very similar though you may get a max of 480 on your chip that was initially only 266 while the new one may hit 550 or something becuase it was initially 333.
So techincally yes you can make your FSB equal to the new ones but the advantages will probably be more power in the end.
We will only know for sure when the benchmarks are released and we see how far the 1333 chips FSB will OC. They might max out around the same as the 1066's even.
Sorry if thats confusing....hard to explain.