I don't think it's doing a disservice to the Pony to say that, all other things being equal, it would be slightly outclassed by a FW190-D in a one-on-one dogfight. The Pony did what it was designed to do very well i.e. provide an ultra long range platform that would also be able to capably go head-to-head with the LW during these incursions. It had good speed overall with both cruise and top speed being high. In a turn fight at high speeds it was more than capable. It was relatively easy to fly for the most part and had a decent armament. It was also quick and easy to construct and numbers in a fight mean far more when the performance differences between platforms are not all that great.
I don't think the role played by the Pony as a war-winning weapon has been overrated. They carried the bombers to Berlin and back home again and were able to engage with the LW effectively during these missions. There was no other plane in the allied inventory that could have performed this role as well as the Pony did. The actual technical ability of the Pony in a dogfight has been overrated but I think we have to be careful not to downgrade it too much - it was still a good overall dogfighter, just not the very best.
In the type of multiplayer match-ups we'd see in DCS you'd have to think the FW190-D would have the edge all other things being equal. Though they never are equal in practice so would still make for some fun match-ups. Going for the FW190-A would probably make for a more balanced match overall but would be a pity to have a plane that's crippled past 20,000ft. The D would also make for better historical missions like bomber intercept with P51s flying escort. Would love to see a Spitfire Mk.XI for an equal head-to-head duel with the FW190-D at some point too.