don't assume!..... the GT is a massive leap forward, its only similarity is the tread pattern, the angel ST was developed way before modern multi's were developed, one simple starting point when buying a tyre is try to keep the launch date of the tyre model the same or newer than the year of your bike, and if you have a brand new bike use the latest offering from your chosen brand, there are no longer any bad tyres.... what you do get is tyres bought for the wrong type of purpose.
Any big fans of the Metzeler 01's. They get a great review on the vid clip I posted above. Ive just been quoted £359 for supply and fitting a pair inc VAT by my dealer.....