I am sure that it varies regionally, but in the upper mid-west the higher octane fuel is also the only fuel without ethanol in it. The pumps are clearly marked as to the amounts of ethanol.

And the price is higher.

I would try not to store the bike over winter with ethanol mixed fuel.

05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter