Which of those two engines is more likely to have a cylinder failure first?
It’s not a hard question, and it won’t hurt you to answer it.
Your hypothesis is that reduced internal cylinder pressure reduces the likelihood of cylinder failure.
It actually IS a hard question to answer. You might assume that it is true, but you can't provide a definite answer without running a LOT of cylinders to failure. A proper answer for the question should include a p-value.