IMO, the Ford guy is right and hes wrong. There is substantiated information that supports the combination of relatively (this being the key word) high compression and mild levels of boost making better power then low compression and higher levels of boost. All of this is predicated on fuel,boost and timing maps being nearly perfected for the 2 combos in question
with compression being the only difference between the 2. That said, a street car will probably do better with the former rather then the latter assuming stout engine componets and a tune that will permit the use of premium pump gas. The reason(s) for this are many but for purposes of total avg power being made at the wheels the higher compression at every level of boost is going to burn the fuel more efficiently. Given the levels of fuel Datruth is probably going to use to meet his power expectations this efficiency isnt something to be dismissed or taken lightly at all. Furthermore, higher levels of boost bring with it the unwanted added intake charge temps of the incoming air and all of the complexities with cooling it (ie intercooling and plumbing,meth inj,etc)., and lets face it, for most of the year in Tampa, we dont need any help with heating air. The higher compression also has the side benefit of allowing better driveability with the larger injectors and camshaft that he will likely be using and a much better torque curve at all points under his max boost level. That said, the Ford guy was wrong in not quite getting the street car point when he advises DaTruth to use C16 everyday everywhere in a car that he probably drives often. Too expensive, too impractical for everyday or often use. Furthermore its likely he would need a tuneup that better be razorsharp and is finicky to sneak up on. Theres a compression threshhold when considering FI for a street driven car and IMO DaTruth is above it but probably not so far that with some changes he couldnt use FI, but would have to know more about his car to be sure.