I am trying to decide between a Macbook 1.3GHz Dual-Core Intel Core M Turbo Boost up to 2.9GHz and a 13" Macbook Air 2.2GHz Dual-Core Intel Core i7 Turbo Boost up to 3.2GHz both with 256GB PCIe-based Flash Storage and 8GB 1600MHz LPDDR3 SDRAM. I would go with the Air if it had a Retina display but the lack is really giving me pause. The geekbrench numbers on the 1.1 and 1.2 Core M don't make the i7 sound that much faster. Can anyone help be get my head around how large the speed difference would be? I know the 13" Air has a 2x faster Flash Drive than prior models. Has anyone tested the speed of the flash drive on the Macbook to see if it's comparable in read and write speed? Thanks!