I’m curious what the cultural differences are that you’re talking about because it wasn’t my experience at all. The only thing I can think of is the culture of cheating to get ahead, which is definitely very real in those places but I didn’t really experience that, not even really sure how one would cheat at flight training.
The real negative cultural baggage I would see was how rigidly they would study the material, to a fault. To the point of only being able to analyze prescribed scenarios (perfectly of course) but not able to respond to dynamic situations and think on their feet. Solo XC endorsements could be scary because of that.
And circling back to my original point, we can go back and forth and Im sure there are endless anecdotes to support either view, but my question is whether the evidence supports these students failing PPL checkrides at a statistically higher rate. I dont think it does.