The 2.3's are about 150hp plus or minus a few at the wheels on a cool day with no humidity. SVT's are in the mid-to-high 150s but only have about 140 or so Tq - which is significantly lower than the the 2.3 cars.
For reference - my car made 146 hp with the following mods:
1) Cosworth CAI
2) Cosworth Exhaust header
3) Focussport 2.25" exhaust - no cat
4) Focussport high-performance tune
5) OEM throttle body
The car made 122 hp bone stock -so these bolt ons were worth 24 hp.