For the gain it's cash spent elsewhere imo, as to the difference in the two, very little as standard (1.8 is 115HP) although it has better mid range grunt apparently.

15HP isn't alot in the real world, although the "Claimed" torque isn't bad for that remap.

Be very careful if you are looking at the modules, Superchips got a bad rep with the blue modules for older Fords which plugged into the ECU which caused more harm than good!

Martin