Why don´t these figures match up?

[Crumpp]

Also it's not an FM issue because even with a completely wrong FM (say if you do the calculation with the "FM" of a juggernaut, you should get the expected values).

So I'm getting the feeling that the speed gauges in CloD are a mess. It seems that they show an incorrect (too slow) speed.
15% too slow for the Spit and 5% too slow for the 109.

Would anybody be surprised?

I have been saying relative performance is correct, LOL.