Well, I really wanted the designation, but close enough Sim Pilot! During the Battle of Britain the Germans cut back on aircraft production, and even, afterwards, then sold 248 (if memory serves) BF-109E, to a variety of countries, including Romania. A little while later they then invaded Romania, so you had BF-109E vs. BF-109E (and F). The winner, of, this battle was of course, the BF-109 (not really surprising), and Messerschmitt, who then had plenty of new orders from the Romanian AF, who were now forced to help the Germans...
Whilst the BF-109F was, in most respect, a superior aircraft, many pilots still prefered the 'Emil' due to it's better handling, and some aces still used it.
The floor is yours, Sim Pilot!