True the VVI is wrong and you can see it from the tacview! What i wanted to demonstrate was the excessive drag, the plane was literally falling down, because i was in a stall, stall means you don't have enough air pressure under the wings to lift you up, in a condition like that it's so strange to not having thrust. Just do the same manouver with a Su-27 and see what happens, i did it, and the plane behaviour is so natural. In particular on su27 you can really feel the Earth gravity: when your nose face the ground, even if you got without FBW and you pull, it's harder to lose speed like the M2000C does. Actually the M2000C seems to fly without gravity... if a plane stalls, should accelerate down, like a falling rock (ok not properly like a rock, you have dragging surfaces) but it's incredible that you brake in the air like that while stalling... it's like having a parachute open on my back!
Anyway if the thrust/weight ratio of those two planes (su27-m2kc) is so similar i don't expect a so evident difference at low/stall speeds, because much more at those speed the aerodynamics and the control surfaces (slats elevators) have a minor importance on the drag factors, and the behaviour should be more influenced just by the weight, and thrust.