An excellent source of information about the 109 is William Green's "Augsburg Eagle...The Story of the Messerschmitt 109."
Green's data on the 109 G-10 lists its weight in clean condition as 6,834 lbs. Its maximum speed ranged from 342 mph at sea level to 426 mph at 24,280 feet, making it the fastest of the G-series aircraft. A 20-mm MG 151 with 150 rounds or a 30-mm MK 108 with 60 rounds was optional as the engine-mounted weapon, and was supplemented by two 13-mm MG 131 machine guns in the cowling with 300 r.p.g.
Martin Caidin states that the G-10 under full power could reach 20,000 feet in six minutes from a standing start.
By way of comparison, Green states that the 109 K-4 in clean condition weighed 7,440 lbs. Maximum speed ranged from 378 mph at sea level to 452 mph at 19,685 feet. The engine mounted weapon could be either a 30-mm MK 108 or MK 103. The MK 103 was a far superior weapon to the MK 108 but was considerably heavier. Instead of the 13-mm cowling guns which were mounted on the G-10, the K-4 mounted two 15-mm Mauser MG 151 cannon with 220 r.p.g. After takeoff, once its landing gear was retracted, the K-4 could reach at altitude of 39,370 feet in 10.2 minutes.
The above data illustrates that, while the G-10 was certainly a formidable aircraft, it couldn't quite compare with the K-4.
To the suggestion in an earlier post that the Spitfire XXI be added to Aces High I would offer the following observations. First, the Spit XXI, with a redesigned wing and a much-strengthened internal structure, was, basically a different aircraft from the models which had preceded it. Secondly, only 120 were constructed before production ended, and only four front-line squadrons were equipped with it. This variant, therefore, had almost no impact on the outcome of the war. Thirdly, the performance of the Spit XXI was only marginally better than that of the Spit XIV.
Any aircraft added to the Aces High hanger should have at least been produced in enough numbers to have been a substantive factor in the fighting. If the Spit XXI is added, then why not add the 109 K-14? Powered by a DB 605 L engine, the K-14 could reach a maximum speed of 452 mph at an altitude of 37,730 ft!
Why should we care that only two of them made it into combat?!
Regards, Shuckins