Well if you've driven the valver, even better
The big difference betwen the valver & willy is the power delivery, you've got to rev the tits off the 1.8 to keep it on the boil as the peak power is higher up the rev range than it is on the willy.
The williams also have a wider track at the front (& some say at the rear as well
) different shocks & springs and are lighter than the 1.8 having no sunroof and less speakers.
The seats in the williams are very comfy & hold you in really well when chucking it about.
Are you looking at getting a 1, 2 or 3? There are subtle differences between them. The 2's & 3's have different wing mirrors, front grille, side indicators, heater controls & more speakers than the 1's.
Only the 1's have a plaque on the dash
Some 2's have a sunroof as it was an optional extra
The 3's have a sunroof & ABS as standard and they're a different colour blue