Well, if you type Hota D6 Pro here, the link is automatically generated by the forum to do a search for "Hota D6" on Amazon, which brings up both. And not the best price either. Raceday Quads ships fast, and it should be free shipping. So at $119, you won't find it cheaper anywhere.
Hmm, the...
Just make sure you look at which D6 you buy. If you need AC power, you'll need the Pro version. The regular D6 is DC only. www.racedayquads.com has the best price on the D6 Pro.