The MBP retina has a higher resolution, and also has two Thunderbolt ports (on the same side as the power, which is nice if you have a Thunderbolt Display with

The MBP retina has a higher resolution, and also has two Thunderbolt ports (on the same side as the power, which is nice if you have a Thunderbolt Display with the combined power and Thunderbolt cable). Also HDMI output and SD card slot on the opposite side. The top-end CPU is a bit speedier as well. It is also a bit heavier, and is not tapered (which I find aesthetically appealing).