There wouldn't be too much difference between them. The larger
cache will help a little bit. The faster FSB (front side bus)
helps a tiny bit.
These are the performance results recorded for the top five
test results for each processor. Each contestant could do
things, like use low latency RAM or some other adjustment,
to make some difference in their results. The software
present on the machine, also makes a difference. (I used to
lose 5 seconds on my old machine, due to Kaspersky running
in the background.)