Statistically, it depends on the game. A Quickspin I saw the other day has a bonus hit frequency on a 96%er of 1 in 176ish compared to the 94%er of 1 in 145ish.
So, statistically, you will, even over a small number of spins. There are many more games and developers whose different models, I would suggest, stand out like a sore thumb.
I don't have enough experience playing different models side by side to back up what I say, but then again, I don't think anyone has, nevertheless, statistically, you will notice the difference, and more on some games than others depending on how the game has been changed.
Its simple, one pays more, fact
Why put it down to bad luck? statistically - it's because you are playing a lower-paying version, so logic dictates its because of the model, not bad luck. To me anyway