Hi true blue . . .
An oil ring prevents oil from getting 'up top' in the first place . . . and getting used/burnt in the business of combustion . . . this why some refer to them as 'oil control' rings . . .
Wet testing puts oil in the top straight away . . . this over abundance of oil creates a temporarily stronger seal between ring and bore. Large variances between wet and dry pressures is typically indication of out-of-round; taper or both in the cylinder bore. Oil can also modestly improve the pressures in a cylinder with slowly leaking valve or hair-line cracked head-gasket (both of which a leak down test will confirm).
10% is the standard of variation between bores. Both the dry and wet numbers are within this variance . . .
What has you worried?
regards,
stock49
