Permabanned
That because although they may be technically a better car, the 205 gti will always go down as one of the best hot hatches ever. The 306 is not even in the same discussion. Good car just not as desirable.A bargain nowadays. With 205 GTis commanding up to £30k you can still buy a decent 306 GTI-6 for just over £5k.
https://collectingcars.com/for-sale/1997-peugeot-306-gti-6