The size of the torch does not matter. If you want it big and to heat up fast, a larger flame will give more heat.
So yes size does matter for the torch. A larger torch heats faster than a smaller one. But the flames are the same temperature. Just that the larger flame is more fuel being burnt.
Learn to use a banger here.
Always be very careful not to let the flame hit your dope glass. That could cause the rig to crack.