If you're really into min/maxing your gear, then Aldor might be the better choice. The shoulder enchant is arguable. With my gear (Hyjal/BT level), the Scryer enchant is actually a .21 DPS increase over the Aldor enchant... basically, it makes no difference. However, if I was Aldor, and I had their necklace, it would be a .32 DPS increase... Also, meaning that it doesn't make any kind of noticeable difference.
But there are other factors to take into consideration:
Scryer Elevator doesn't kill you (doesn't matter when you get your flying mount)
Scryer Tabbard is much cooler
Scryer Rep is much cheaper and easier to farm with SSO dailies
Scryer Tier is closer to the flight master.
Personally, I'm scryer. I chose it for all the reasons above (except the rep thing. I made exalted before 2.4). I'm not unhappy with my decision. I'm just unhappy with all the people that talk **** on Scryer.