Have seen Exiges with the Katana supercharger and various BHP outputs. These also seem to sell for slightly less than Lotus versions.
How do the Katana compare to Lotus superchargers?
Obviously the Katana doesn’t have the intercooler, is this detrimental compared to the Lotus supercharger?
What are the differences?
If you have the money by a factory SC car, if you don’t by a Katana car, the S is cheaper to bigger HP from and will retain it’s value better.
Definitely not a bad thing to own a katana powered car but it is modified already so will always command less money 
They command less money but will they loose money? Exige S are just going up in price.
Are they all charge cooled?
I don’t think they will lose money but stay just ahead of NA cars and lag behind an S. This is where they have been for a long time, always be harder to sell though than a standard car.
I wouldn’t go Katana - maps are questionable and, to answer your question, no not charge cooled as ‘std’ - try to find Hangar 111 car if you want modified - I have the 280s kit after having a katana that was fraught with issues and its a great car now…