Looking for a new front tire for my 500. Was going to fit a Pirelli MT 21 Rallycross but now stumbled across the Dunlop D 606. Bike is a licensed SWM RS500R, used mainly off road but sees some tar and fast gravel on occasion. On paper the tires are looking very similar. Any pros and cons which makes one of the two superior to the other? For the rear I have a Michelin T63. Cheers Lars