Wheels, brembo brakes (4 corners in VF2), HUD, and FE3. What else was there?
In series one on early models:
Titanium trim with red stitching
Better foam used in seats with additional bolstering on front seat bases (early production only)
Forged alloy wheels with wider rears
Dual horns
Cup holders that slide out of rear seat base
CD/DVD player with BOSE audio as standard and surround sound on the DVD
Rear aux jacks available, but not used by default
Upgraded front suspension with aluminium parts (aka HSV)
Thicker anti-roll bars front and back along with some other suspension tweaks like bigger dampners
Revised exhaust
E85 fuel supported
Clear coat in engine bay
Competitive mode
Launch control on manuals
There was also more standard equipment like sunroof, forward collision alert, rear collision alert, lane departure warning, rain sensing wipers, full colour displays on instrument panel, HUD and sat nav.
That is what I can remember off the top of my head from my car. I think there was more, but I can't remember it right now.
Some of these features were cost cut out of the car as series 1 progressed and many were deleted by series 2 or revised again.