Also the stats don't take account of the fact that the majority of those buying the T67 probably did so for aerobatics and/or spin training; whereas the C152s will rarely have been spun if ever. Much higher exposure to risky activities per hour.
Where are the stats for the Zlin? Grob 115/Tutor? A friend of mine (and A and C's) nearly had to abandon a Zlin which wouldn't recover from a spin for some time and turned out to be outside C of G limits.