Stock 2006 RSX S, Stock 2006 GTI.
I'll give you $600 to spend on each of them Mod wise.
At that point, there is NOTHING you can do to an RSX S that will add 45+ HP and 75+ TQ for less than $600.
Stock numbers for a 2006 RSX type S: 200hp/140tq. Typical Honda 0 tq numbers.
Stock 2006 GTI: 200hp, 207tq.
2006 ECU Stage 1 tuning numbers on 91 oct: 246hp/282tq.
The only thing that is making ANYTHING close is weight difference. GTI: 3133lbs, RSX S: 2840. 300 lbs.
Either way I guarantee you can't get a HP/TQ increase that high spending less than $600 in mods for an RSX Type S. Or any other Honda product for that matter.