Tyre Performance - is their a difference?

Was wondering…if anyone can tell me (or direct me to a site)

The difference in performance between Tyres?
Was thinking about the actual time difference that the lower rolling resistance and light tyres gain over a cheaper or Training tyre?

For example…
Do you gain anything from using GP 3000s on a pair of Rolfs rather than Conti Gator Skins (Thick for training and puncture resistance)?

Again are the Conti Attack/force…super duper race tyres significantly quicker still?

Many Thanks
Sam