The only difference is that one has an ASUS SLP.TXT in BIOS and one has HP.TXT SLP in BIOS. Both have HP SLIC 2.1 in BIOS. The Cert is a Vista HP Cert so IDK if that works on Windows Home Server. It does work for Vista and Windows 7.
Sorry for the confusion guys and thanks for the information. NoJuan999 any chance you can add that SLP to the BIOS? Thanks!