Valve To Piston Calculator

The lift on the old cam was .558 on the Ex. and .522 on the In.
The new cam has a Ex. lift of.523 and a In. lift of .520.
From what I understand it's not the lift but the duration that makes the valve closer to the piston. And it's closer on the exhaust than the intake.
I turned it by hand and it didn't touch, but that doesn't mean it's not to close.