I purchased these on sale. They are supposedly built with the same sizing model for the upper as the lower Recon 2.0, which I own. Based on this I presumed similar sizing. Both in a 47, the Recon 2.0 is slightly smaller than the S-Works, which is every so slightly longer. The heel box in the S-Works is where there are significant differences. Very high, rigid sides. Once the shoe is secure, they dig into the underside and front of my heel. You may think it doesn't matter, but wait until you're into hour three, four, or five, and can't stand out of the saddle for fear of pain, or the next day when you have bruises...
They are very light and stiff shoes. The cleat can be moved very far underneath your foot. I actually like the laces, which I was trepidatious about. I simply don't want to wear them because they hurt my feet on and off the bike. Perhaps they will fit you better.