Define excited?
Once the Wildcat exceeds around 60-70% power it goes to rich mixture and takes a big jump.
The Merlin and Allison also take a big jump but two things happen here.
One is that the liqued cooled engines, due to better streamlining, use less power in cruise (at least P-40s and Spitfires) compared to round engine fighters (P-36s and Wildcats) and don't have to run rich mixture quite as soon. The other thing is that around 300mph or so even if they are using rich mixture, they aren't using as much power.
There was a reason they did 350mph on the same power the round engine plans did 320-330.
Hurricane II was supposed to do 302mph at 20,000ft at max weak mixture.
The liquid cooled engines used rich mixture for cooling and for detonation control, they just didn't use as much.
Please note the Liquid cooled engines had more problems with mixture distribution (one cylinder in the bank of 6 running leaner than the others) and that was also a reason for the rich mixture.
DB 601 and offspring were a lot different. The fuel injection took care of the mixture problems and the fuel injection also meant they didn't have use rich mixture for power quite as much.
DB 601 used from 210 grams per PH hour to 232 G/PH/H from around 800 ps to over 1000 ps. (including the 5 minute rating) at 1100PS (the one minute rating) it went to around 250/270 G/PH/H.
The 230 G/PH/H is about .51 lbs/hp/hr. so yes, the DB 610 sucks down a lot less fuel than any of the allied engines and especially the air (fuel) cooled radials even when it gets "excited".
This was about as bad as it got, most of the later DB engines have listings from 210 to 225 G/PH/H unless they are really operating in strange territory.
So yes, I am arguing that the Wildcat uses fuel at a higher rate, because that is what all the engine data sheets say.