This funny, I looked at both of these this weekend. I am leaning towards the Exo-1000. The Scorpion is DOT and Snell rated, while the HJC is only DOT. The Scorpion costs about $50 more, but it does have the pump up cheek pads for a custom fit.
The integrated shade is easier to use on the HJC.
The visor on the Exo is anti-fog, dunno about the HJC.
The Exo is supposed to be a little quieter than the HJC. Most hi-flow helmets aren't quiet tho, so neither of these are as quiet as they could be.
There are supposedly pockets in the HJC for comm systems.
Exo:
Helmetharbor.com Domain Gone
FS:
Helmetharbor.com Domain Gone
I didn't buy yet, but I think I settled on the Exo.