Same as a standard Norton head. It's the same design. Just with more meat to accomodate the revised porting. But, in standard form, the head will give you all the power you will ever need in a road going Commando in all the right places, meaning, right through the rev range, beginning at idle. Big valves are for racers who want everything they can get, but with the advantage in the upper mid range and higher revs.
The standard ports on Fullauto Technologies heads, designed by Jim Comstock, are a distillation of over thirty years of knowledge in making Nortons go better. My own bike has a standard FT head with not even the ports tidied up and it feels very strong, even with a single Mikuni VM 34.