Ratio

I know there is not going to be an exact answer, but an approximation would be nice. What is Approximate ratio between a standard medium grip, no bench shirt, bench press(1 or 3 Max Rep) to a close grip bench press??

Mine is very close- within 15-20 pounds. Is this right or should i assume there is a musle imbalance somewhere?

i don’t know, but my close grip is 45lbs lighter. I bench with a rather close grip too, ~ 1 inch outside the knarled part of the bar.