Apples to oranges. Ones NA and the other is boosted. You're going to max out at 600hp with the V6 because that's what they were able to squeeze out of the GT. Meanwhile, I can slap a supercharger on the 6.2 and get 685hp. Rebuild the engine and you're looking at 800.
It's just too small of a platform to build off of. Takes all of the fun out of it. I get they are trying to show off the ecoboost but they are limiting the Raptor and the GT.
As something from the factory? You're probably right.
My car(Evo) made 894hp and 715tq out of a 2.3L, and that is actually measured at the wheels, not numbers at the crank.
The V6 in the Nissan GTR has made >1900whp in a couple of the major shop's development cars. AMS and ETS.
Both those platforms, the 4G63 and VR38DETT have huge aftermarket support.
Try to buy a "build" for the 6.2. Livernois doesn't stock the internals, the one guy on the forum here that has the big build with the blower and "built" motor ended up having to get one-off custom parts(pistons, cam, etc) made for his.
The most important thing here, is that whatever engine that ends up in the Raptor is shared with either the Mustang or GT, so that there is actual aftermarket support
And how much do you actually need for the dirt? Don't baja-winning trucks have 800ish?