On that note, as a professional female in the tech industry for more years than I want to admit publicly, I love both my MBA and my rMB. Both are small enough that I no longer use a laptop bag, I use a mid to large size handbag as my laptop bag. My family thinks it's a riot that I'm carrying a women's handbag for the first time in decades, and i carry it for my laptop, but the bad guys see a laptop bag and they see dollar signs. They see a women's handbag and they think hairbrush, lipstick, etc.
I have both systems maxed out which equates to the MBA having a 1.7GHz Core i7, 8gb memory, & 512gb flash, and the rMB has a 1.3GHz Core m7, 8gb, & 512gb flash. Both systems are fast, great machines, but one thing that the MBA has way over the retina MacBook is the battery life. My MBA can go days and days without a charge if I put it to sleep in between uses. The retina MacBook not so much. It still has a very decent battery life, but it is not the astronomical battery life of the MacBook Air. The retina MacBook has a great screen, and once I got used to the keyboard, I found I type faster on the MacBook than on other systems (I have a few), and it is lighter, thinner, and smaller than the MBA. The MacBook Air has an upgraded display that while not as sharp as the retina MacBook, is still very clear and sharper than most displays on the market (13" MBA = 128ppi, 112" rMB = 226ppi). I love that the charger on the rMB is a two piece charger as I have a bunch of furballs at home that seem to all love chewing Apple cables, and replacing a $25 USB-C cable is a lot easier on the wallet than the $79 Magsafe. Both are very reliable, although the rMB does not have the track record of the MBA.
Basically, they are different machines, and I take that into consideration. As I said earlier, I have a few Macs, and one of the Macs I have is a 27" iMac, so my usage may be a bit different. Knowing what I do, if I were looking at having just ONE of the two laptops and I was looking at it being my only Mac, I'd opt for the MBA.