VHP has no backup, fax program, RDC, or BitLocker. Most of the "Ultimate Extras" can be installed on any version anyway, for example I have DreamScene on VHP.
As for the other programs... BitLocker is extreme for any home users needs (I TrueCrypt if I ever have to encrypt stuff, it's free), RDC can easily be replaced by some form of VNC client if really necessary, I don't fax, and I have Acronis True Image from years ago.
Home Premium is the way to go if you're actually buying it.