There's not going to be a whole LOT of difference between the two, although the AHCI protocol used for for SATA includes some additional performance options that IDE doesn't support. For new systems there really is no reason to use IDE, it's there solely to support older hardware or software drivers such as those included in Windows XP.
Warning - if you installed Windows with the BIOS configured in IDE emulation mode, switching to AHCI (SATA) mode will render it unbootable. There's a relatively easy fix for this which I can post if you need it.