I “suppose” so =) I guess this evolves into the basic argument between “hey we use native controls” and “build for both platforms with ease”. In a perfect world it’d be nice if Xojo under the hood intervened and made them equivalent so no extra coding had to take place.
I figured this out: Let’s only concentrate on a Window that has a decorative GroupBox as a boundary that is 16px inside the Window. (That’s typical design.)
Mac Frame: +0 adjustment
Win Frame: -8 adjustment
Mac Objects inside GroupBox: +4 adjustment
Win Objects inside GroupBox: +2 adjustment
Given a Method that makes these adjustments, they look centered and margined for both Mac and WIndows.