You got the classics which are all pre 2000 and they have their own versions (v1 v2 and such). Bug eye from 2000 to 2003, blob eye from 2003 to 2005/55 plate. Hawk eye on until the hatchback.
I have a classic turbo 2000 myself and have tried to extend my knowledge on those before confusing myself with any other models. I'm still learning myself too [emoji4]
The hawkeyes have the 2.5l engine which changed the tax bracket which a lot of people seem to avoid.