Preferred? Hmm. Ask 10 GW riders what's the best tire and you'll get 13 answers...
I've only had the 'Stones and the E4s.
I like them both.
I like the Stones better in rain and puddles.
I like the E4s better for hot tarmac and tar snakes.
The E4 dual compound should last longer for people who ride straight a lot.
To some? It depends which marque is on sale.
Either way you cannot go wrong.
Cheers,
Steve