SCREEN color slightly different??

All screens vary. My last 3 iPhones have looked different from my wife's. It has nothing to do with the bezel color.

 

My guess is it's a "panel lottery." Apple is almost certainly using more than one supplier for the screens and each manufacturer's panel would be slightly different although they'd still satisfy the minimum requirements. I once had two iPod Touches manufactured a few weeks apart but with very different color temperatures on their screens..

 

The white frame may also be affecting your perception. If the light reflected by the white iPad frame is warmer than the screen, the screen will look bluer through an optical illusion.