neither do I. What you are asking requires either enormous numbers of calculations, or to go with the literature, which, although is not often authoritative or even correct, usually puts pulsejets in the Mach 0 - 3 range, at altitudes less than 50,000 ft.

Since ramjets are usually boosted to even higher altitudes, using a rocket to achieve the minimum airspeed needed for combustion, usually in excess of mach 3, I am going to rationalize therefore that pulsejets are not capable of the same flight envelope as a ramjet.

On the other hand, there is no reason why different kinds of engines can't be fitted to the same aircraft. There are several suborbital vehicle designs that incorporate both rockets and turbofans.