Nothing in my opinion. Not an Apple fan.
In my opinion
XPS 13 $1299 v. 13-inch MBP $1299 (advantages are bolded)
- CPU: 2.2 GHz i5 (5653 geekbench) | 2.7 GHz i5 (7858 geekbench)
- RAM: 8GB DDR3 1600MHz | 8GB DDR3 1866 MHz
- GPU: Intel HD Graphics 5500 | Intel Iris Graphics 6100
- SSD: 128GB ~510MB/s read | 128GB ~1200MB/s read
- Display: 3200x1800 touch | 2560x1600 non-touch
- Battery: 52 WHr | 74.9 WHr
I don't think they're that much "more expensive" than you think.
Also, there's the fringe stuff: Case design and quality, internal speakers, thunderbolt, 10-finger multi-touch force-sensitive trackpad, HDMI port, MagSafe, OS X (arguably)
You can’t find a windows laptop anywhere with the same level of quality and build. Sure you can get a windows laptop with “dope specs” for less. But that’s not atop priority for real Mac users. The quality control on Dell and HP is horrendous, the customer support is an indian call center overseas paid cheaper than usual.
I use a Mac for work, with Unix you can’t find a better Linux machine. Editing videos, pictures, and audio are all superior with Apple’s line of software. They work better on a Mac that’s fully optimize for the software even with lower “dope specs”. The keyboard and trackpad are superior to everything on the market. The retina screen is second to none. The frame itself, none of that wobble or creeking like a windows laptop.
MacBook Pros feel premium, durable, and even after 5 years they still work like new.
The MacBook has many advantages and the main advantage is the comfort in work. Now I use Mac book air Pro and am very pleased with the speed. By the way, if you plan to buy a new MacBook, then save on pre-installed software and buy oem soft online for Mac at a cheap price.