I will have to disagree with you on this. Less that max power may be what you would want to use for maneuvering for combat, but when it comes to yanking and banking and the bullets flying are not virtual, all the power you can get is life or death to you and victory or defeat in combat.
Please clarify this statement. Is 846 an airspeed number of some sort?
An undeniably true statement, but to dismiss allied aircraft as being inferior to German aircraft and won only because of numbers is incorrect. Except for the jet, all the advanced German propeller driven aircraft could be matched by Allied aircraft of equal or better performance, except maybe the Ta-152H at altitudes above 35k ft. But then I don't thing nitrous was particularly rocket science.
This is a valid point and one I have pondered for quite a while. In my mind there are only two useful comparisons between aircraft. One, which I did above, is to compare the aircraft under similar load levels, which provides capability of the aircraft design itself. This is certainly the easiest do and certainly tends to represent parity of combat in some scenario, though maybe fleeting or rare, of battle. The one you describe is the conditions likely at the onset of battle. This one is quite variable and tends to take a lot of work. Just looking at the P-47D-25. If we took it at a long distance escort and combat starts right after external tank jettison, then the combat weight of the P-47 would be close to the 14,000 lb point that you indicated, while the Bf-109 would be at a bit less, burning off climb fuel, than published loaded weight. However in the summer of '44 and later, when mainland European fields became available, then the P-47 would be more likely to have the smaller fuel weight.
Again, industry, trying to model aircraft for operations simulator purposes, spend millions of dollars on software and hardware, something I do not think game people can do or have the expertise to do. This is not to say that video game software is not a valid tool for training pilots, it is, just that it is not a precise copy of aircraft aerodynamics and environment. And whatever you do, do not believe that if you are good in a video simulator, that you would be good in an aircraft. The environment is totally different with g loads, vertigo, vibration, noise, aircraft physical communications with the pilot, physical exertions, FEAR, etc., etc., etc.