Difference Between V2.076 and V4.03
 

I'm a bit of a noob to tuning via a tablet like the OFT. Is there anyone out there that's used both the V2.076 Stage2 93 tunes, as well as the Current V4.03 Stage 2+ tunes and be able to tell me the difference?

I'm currently on the V4.03 Stage 1 and can say the car feels much better than stock, I'm just wondering which I should use when I do my header/exhaust?

I've heard the V2 makes the car sound louder and the throttle pedal is a bit more sensitive, where V4 quietens the car down in the lower RPM range, and the throttle pedal from my personal experience is a bit more dull than stock.

I also noticed the V4 tunes are good for 91/93 Octane where as the V2 have specific 91 and 93 octane tunes, in my mind that seems better since it allows the tunes to be more granular, but I've never done this before.

Would anyone out there that has experience with both be able to clarify? Is one specifically better than the other or do they both have their ups and downs?

V4 all day. The driveability is night and day compared with v2. You can fill with premium gas and ecu will adjust according with the octane range. Also neighboors like it

See this thread...
http://www.ft86club.com/forums/showthread.php?t=126519