In my opinion the Cortex isn't worth the extra money. Basically you get a grey one with a two year warranty or a red one with a one rear warranty. My Fashpaq turned two this past August (I think) with no issues other than my own. Not to mention, I was told that if you purchase and install the advanced trans tune it imediately voids the warranty and it is documented. And I'll make a freindly bet that when or if you call to order the advanced trans tune that they will not mention it. That being said, what's the purpose of the two year warranty with the Cortex?
I just want to clarify to avoid people getting confused. Both tuners come with a product warranty from superchips. The cortex offers a 2 year vehicle powertrain warranty, the flashpaq does not.
It's all been mentioned above, but basically the differences are:
Cortex offers 2 year powertrain warranty for your vehicle(flashpaq does not)
Cortex is grey, flashpaq is red
Cortex can be used on gas and diesel vehicles(flashpaq only on gas vehicles)\
I agree not worth the extra money for the cortex. I've seen a lot of people running flashpaqs and never an issue.