The thing is. I'm really not an apple fan boy. I've only had one mac. I've had one iphone and moved back to android. I would never have a desktop mac. However, the usability, portability and reliability of the mac laptop has made a huge difference for me. All the little details from the os to the hardware make it the only laptop that I've had that has been great from my productivity, even when I was doing physiotherapy twice a day for 6 months and carrying my laptop between hospital beds.
The Dell XPS13 does have numbers that are interesting, however, if I've learned something from my experience with a mac laptop is that numbers are only part of the story. I wouldn't want a windows os and despite still enjoying linux I really enjoy that I don't need to worry about anything working properly on the mac, it just does, and I can focus on my work. Then it's the trackpad (in conjunction with the os)... Minor things, that make a world of difference.
So...I really really would like to buy something other than a mac, but I just can't see it.