That would indeed make sense, but as mentioned, the Ju290 prevented that, so the Fw190 ended up with a "D" variant instead of a new designation.
But again, there's still some question as to what really was encountered.
Like I posted earlier, RAF pilots were claiming He113s during the Battle of Britain and there's a USAAF action report where a pilot claimed an He280.
During a an air raid over Sophia, Bulgaria, the Royal Bulgarian Air Force intercepted a flight of US bombers and they spotted a flight of inbound fighters and welcomed their approach, as they saw them to be Bf109s.
They were wrong, this inbound flight were P-51Bs and it was almost a fatal mistake...