[Mark IV]

Advantage? None.......let's see where THAT firestorm goes!

All have advantages, the real value is what YOU place value on and what you want to do with the car.

I can make an argument that the SPF suspension is more tunable than the CSX. The CSX has the original round tube frame with both the advantages and disadvantages of that design. The CSX does carry the "Shelby" name and for some that is enough to justify the purchase.

The ERA is very well done but unless you have it factory built there is the question of quality that could be an issue with some self-builders. Again, I have seen ERAs that put anything to shame for quality.

The current CSX fiberglass cars are built side by side with SPF so I would rate finish quality as equal.

The best? The one YOU like and drive!