Ive always ran vp m1, my personal experience is it seems more consistant, never noticed diffrence in power and you get a fancy jug with it. I read somewhere its like a 1% increase. I buy it for peice of mind that i kno exactly what im getting. I also am from mi and pay $29 for 5 gallons, comes out to just under 6 bucks a gallon, still half the cost as race fuel, and 2$ more then if i go to local race shops and pump my own.