What's the difference between a SP reventon pro esc & SP reventon pro v1.1 ?

[waztrain]

Hi

I just wanted to what are the differences between a reventon pro esc (costing around £84) and reventon pro v1.1 ( costing around £135) ?

The only physical difference I can see is the v1.1 comes with a fan but that can not warrant £45+ price tag just for a fan.

I am just curious about this.

Also does the reventon pro run cooler then the SP gt.2?

Waz