The Reference Image feature is probably more limited than what you expect, not considering pixels as absolute units. Start by looking up the Blender documentation about it ; and then you'll most likely have to work with it as opposed to against it, by simply providing it non-cropped images. Make all your refs sit within…
1/ So basically i have this simple reference setup in photoshop for blender 2/ I crop based on guide lines reference parts and export every as png 3/ And just for problem showcasing, I will select only two images that I cropped "side view" and "front view" and exported from Photoshop So they are both almost equal in height…