[Gizmo]

Hi,
In various sources, I have found two difference informations about top speed of the Reggiane 2005 fighter.

1. 678 km/h at 6950 m, or
2. 628 km/h at 6950 m

Personally, I think that first one is top speed for prototype a/c with originally German-bulid DB 605 engine. Second one - I think - is for aircrafts with Fiat RA 1050 RC 58 engine.
I'm really not sure, that I think right or not.
Does anyone have information about that difference ?