QPixmap::Scaled() gives different result when windows scale ratio is more than 100%

When Two Icons are scaled using  QPixmap::Scaled(16x16) one icon looks smaller and other looks bigger. This can be seen on windows machine having scaling set more than 100. 

Expectation is it should always display same size because both icons are requested to be scaled for (16x16) size.

Attached example you can see red icon is bigger than green though both has been asked to be scaled in same size.