I'll grant that I may be dissing Dell and HP in part on the basis of their more downmarket and/or "desktop replacement" laptops which tend toward the boat-anchor characteristics.
On a vaguely related note, one aspect of Dells I've found particularly annoying is their implementation of the Trackpoint. While available as an option on some laptops, I found that the rubber used on the nub was harder, and far more irritating to my index finger, than that used on Thinkpads. It's almost comical that user satisfaction could come down to an issue such as this, but over the several months I was using a company-issued Dell, I found that to be a constant annoyance. I tried sanding down the bumps on top, substituting a spare Thinkpad nub (the bases are sized differently, it didn't fit), and a few other tricks. Ended up with blisters on my finger.
On a vaguely related note, one aspect of Dells I've found particularly annoying is their implementation of the Trackpoint. While available as an option on some laptops, I found that the rubber used on the nub was harder, and far more irritating to my index finger, than that used on Thinkpads. It's almost comical that user satisfaction could come down to an issue such as this, but over the several months I was using a company-issued Dell, I found that to be a constant annoyance. I tried sanding down the bumps on top, substituting a spare Thinkpad nub (the bases are sized differently, it didn't fit), and a few other tricks. Ended up with blisters on my finger.
The 13" MBA weighs 2.96lb, the 11" (too small for my blood) 2.38: https://www.apple.com/macbook-air/specs.html
Lenovo's Carbon X1 is 3.09lb: https://www.lenovo.com/shop/americas/content/pdf/system_data...
Though here it's claimed "starting at 2.8 lb": http://shop.lenovo.com/us/en/laptops/thinkpad/x-series/x1-ca...
The Lenovo also sports a 14" display, your Dell a 15".