So at the moment I have a 2011 15" MBP and looking to upgrade ready for uni. I really want the rMBP but need to know how much lighter it is and whether the weight will be a great help when carrying etc otherwise I may have to look into a 13" MBA
If you read Apple's technical specs, you'll see the 13" MBA weighs 2.96 pounds, and the MBPr weighs 4.46 pounds. You probably won't be able to tell the difference in 1.5 pounds.
If you read Apple's technical specs, you'll see the 13" MBP weighs 4.5 pounds, and the MBPr weighs 4.46 pounds. You won't be able to tell the difference.