Honda Spec Tires

Does anyone know the difference in the honda spec version of the Pirelli Diablo Corsa v/s the non-honda spec version? As luck would have it, I've run over 2 nails in the past 3 months and none of the dealers around here know what the difference is other than price and availability. Since this is my 3rd tire in 3 months, I ordered the non-honda version. It was either that or wait until september for the next available honda tire. When the non-honda tire arrived at the dealer, we compared tires side by side. They looked identical and had identical markings except for a "H" at the end of the model number for the honda spec tire. Should I be concerned? And fyi, the honda version is cheaper.

first i`ve heard of `honda` tyres? whats all this then?