What are the cylinder leakdown test percentages, and where is the leakage going? A couple of tablespoons of carbon buildup in varoious combustion chambers can account for the differences in compression pressure. A compression test is about as accurate as the old phrase "Measure with a micrometer, mark with chalk, and cut with an axe!" Real mechanics don't rely on a compression test for anything beyond a "wild-donkey guess" about what's happening inside an engine.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!