Does the new iPad Mini with Retina display use the same glass?

I am a shop in Los Angeles and took one apart today. It is 100% a different glass. Same size and same ic chip, but the glass has a purple hue to it. Very disappointing cause now we have yet another part to take a year to come down in price.

By sight it is noticeable, instantly. I am thinking that the purple hue increases the contrast. Did Apple really add a "retina" display or is just tricking us with this tinted glass...hmmmmmm???

The customer I had was happy with the repair and didn't mind the "normal" glass. I would think that taking it to apple for any warranty the 'genius' would notice, but be all know how un-genius they can be.