Since no one in this forum has ever flown a FW190 "better" is certainly subjective. Every modeler takes different approaches to get the feel they want. I strive to use 100% accurate data and placements of the pilot, fuel tanks, and control surface areas and movements. Some folks do not do this and they manipulate the file to get the plane to behave in ways they want which may or may not be accurate.
That is not to say Beckwith's file is bad it is just different. An airfile made in 2005 with the old software even with the SAME data will yield vastly different results.
So, back to my files. I use the data that is official German from handbooks and other documented sources. I also use flight reports from several evaluators to develop a balanced model. I do not adjust the COG to get the "feel" I want because I do not know what the feel is. I just try to put the numbers in, fly the plane and make some adjustments to rate of climb, speed, engine power and such to mimic the reports. Some guys do not use accurate defelection angles for the control surfaces which cause HUGE problems in the roll rate and elavator control etc.