Last night a question was raised on the FW variants, this is what the Jane's Vintage Aircraft Recognition Guide has on the A/F/G difference's.
The FW 190 caught the RAF by surprise when it appeared over the channel front in 1941, and it remained unmatched in aerial combat until the advent of the Spitfire Mk IX in late 1942.Powered by the compact BMW 801 radial engine, the FW 190 boasted excellent handling characteristics to match its turn of speed.The A-model FW190S were the dedicated fighter variants, and as the design matured so more guns were fitted and more power squeezed out of the BMW engine.By the end of 1942, production of the FW190 accounted for half of all German fighters built that year, and the fighter-bomber F/G had also been developed- F-models entered frontline service on the Eastern Front during the winter of 1942-43.All manner of ordnance from bombs to rockets could be carried by the fighter-bomber FW190, and additional protective armour for the pilot was added around the cockpit.Variants of the FW190 saw action against the Allies on all fronts of the war in Europe, and the aircraft remained a deadly opponent until VE-Day.
Hope this is of interest