The HD650 box has a photo of an HD800

There is no version of the HD650 that looks like an 800. It's a mistake. But yeah, that's a wasted vote, for something they already sell.
One of the rationales for the 800S was always supposed to be mo' bass (in addition to smoothing out the highs) so not sure that is correct.
I'm not buying ither but I am a massdrop member so thanks for the heads up