Anyone have experience with both of these? I've ridden Rol-y Poll-y's for five years and couldn't be happier. I ordered a new pair and was sent the Ruffy Tuffy's instead. Will they give a significantly harsher ride than the Rol-y Poll-y's? I've ridden Armidillos in the past and didn't enjoy the experience one bit. Should I go ahead and exchange the tires or will I be just as happy with the ride of the Ruffy Tuff's despite the thicker tread?