There's no need to be impolite and rude.
The differences are only 5 kph and these can be trim,fuel, altitude and weather dependant too.
I just retested after years of promising myself not to.
1*
Fw190 A4
Map: Crimea
Time: 12:00
Weather: Good
Fuel:50%
Arming: Empty
Altitude: 150m
Max Airspeed: 525kph IAS
2*
Fw190 A4
Map: Crimea
Time: 12:00
Weather: Good
Fuel:50%
Arming: Default
Altitude: 150m
Max Airspeed: 520kph IAS
3*
Fw190 A4
Map: Crimea
Time: 12:00
Weather: Good
Fuel:50%
Arming: U1 / 121 outer removed
Altitude: 150m
Max Airspeed: 515kph IAS
The FW series are very elevator trim dependant.
I could make the speeds very different between the aircraft if not correctly trimmed.