compared to the MBA it is a bit bigger too
compared to the MBP Retina, it is at least 700 bucks cheaper (from where I bought it, think its still $1200)
The trackpad cannot compare to the Macbook range (first hand experience from a friend). The audio does not compare. The screen, even though high resolution (less than retina in pixel count, higher than retina in display resolution), lacks vivid colour. Other aspects such as battery life and CPU benchmarks are slightly worse, but not by an amount that's worth mentioning. Nevertheless, it is still worse than the Retina in every way. The same goes for the Samsung 9 and HP Envy.
I won't get myself into an argument about whether these differences are worth $700 (accessories and options in a new BMW can cost more than an entire Toyota).
Anyways, the choice between Apple and non-Apple is usually a lot simpler. It depends on which OS the person is more familiar with. It's very hard to switch from one to another.