What is it that I am missing between these two?

[Gee]

Castle Creations Mamba Monster 2200kv Combo - 296.99
http://www3.towerhobbies.com/cgi-bin...&I=LXVHA5&P=ML

INCLUDES: 2200kv Neu/Castle motor
18 tooth Pinion gear
Mamba monster version 3 speed control


Traxxas Mamba Monster Brushless System 2200kV E-Revo - 510.00
http://www3.towerhobbies.com/cgi-bin...&I=LXYJJ5&P=ML

INCLUDES: Castle Creations Mamba Monster Electronic Speed Control with Cooling
Fan
Castle Creations 2200kV Brushless Motor
18 tooth Steel Pinion Gear
#5690X Single Motor Plate (TRAC5691)
#5677X Single Motor Cover (TRAC5678)
Installation instructions

I don't see why the Traxxas one cost 210 more then the Castle. Only the traxxas one lists the fan but I think they both have the fan inlcuded. I bolded the only items I found in the descriptions to be different. I don't see much else except they have the Traxxas controller setup for connecting two batteries in series using trx connectors. What else is there that I am not seeing for the extra $$?