Either should be fine. Don't know what you're using it with, but on the surface, you're good to go with either.
Technically, the XFX 650 isn't on the recommended list. Go with the Antec.
Yeah, I've seen reviews that are suprisingly mixed with that PSU. That's why I hestitated, I thought all XFX PSU's were pretty much flawless. Thanks, I ordered the Antec.