It is in fact marginally lighter than the 13" MacBook Pro, but the difference from the 15" model is less than on the 13" Air. The 13" MacBook Pro is 1.35 kg, and the 13" Macbook Pro is 2.05 kg (53% heavier than the Air). The MacBook Pro with Retina Display (mid-2012) is 2.02 kg while the 15" MacBook Pro is 2.56 kg (27% heavier).
