I’ve managed to snag an iPad Air for review purposes and I put it through it’s paces against the Surface 2 in this video review. Both devices are comparable and they are excellent devices. Spoilers: I like both of the devices! In the Benchmarks I run through Mozilla Kraken, Google Octane, Sunspider, and GLBenchmark T-Rex 2.7. I also go through a large pdf on both devices and compare the built in map applications.