Your right if your comparing the 710 to the 550. I would rather have the 550.
Yes I bought one of the first 710's, had it at 3.1ghz but I went to the 550 at 3.9 and was much happier. As a quad it's only stable with reasonable voltage to 3.8, so thats where I leave it. I was able to run 3dmark06 at 3.9ghz as a quad but it's not P95 stable.