Ok.
Basics
The car was launched in the uk in 2003 with 276 bhp.
The GT4 was launched (special edition, numbered - different wheels and availabale in ultra Yellow or Kuro Black) this model had the 'rev up' engine with 296 bhp.
2006 face lift (very mild) used the 296 bhp engine, slightly different bumper and different lights front and rear. The layout of the interior is slightly different.
2007 saw the launch of the 313 model. It has a new design engine but again looks kinda the same apart from a 'bulge' in the bonnet and a new range of colours.
All standard UK cars have had two trim levels. Base and GT. GT included leather elctric heated seats, bose and cruise. The non GT had cloth seats. Rays forged alloys were an option until '06 then they became standard fit.
I think that gives you a basic answer. Any more questions then fire them up and we'll try our best to answer them.