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Retina has a better screen resolution and more pixels, display is better on the Retina
LG Display
No, But there coming out with an ipad mini 2 soon with retina display
macboook pro retina display
macbook pro with retina display way better
Mostly. Note they both have the same retina display. The iPad with Retina Display has the A6X chip which does have better performance than A5X in New iPad.
Yes
no
LG
yes. i believe its a 13 inch but i don't know if it has retina display though
The Macbook Pro with Retina display does have an HDMI port. The Macbook Pro without Retina display do not have a HDMI port.
No, the Retina display model does not have a DVD-ROM drive. You can buy an external drive if need be.