I would guess that is why there are so many different numbers out there because it depends on so many different things (altitude, fuel load etc.)
yes, alt., fuel load, weather conditions, etc.
everyone's making a big fuss about the fuel they had, but i think the japanese had taken that into account when they built their planes.
VNE that i had mentioned is the never exceed speed.
that was why i had asked what definition of top speed we were using. top cruise speed(maximum structural cruise), leaves you with more speed to call on, even if you do have to pitch nose low to get it.
really though, i think the top speeds aren't as important as things like wing loading, turning ability, e-retention, etc.
these planes certianly don't turnfight at their top speeds.
even in the attempts to re-set the fight, i think acceleration is more important than top speed.