In comparison, the Dell one is €1400. €300 is a significant price difference IMO. Of course, they're not entirely the same. The Dell one still has a better CPU, the Apple one has a higher res display. The Apple one obviously comes with OS X, which could mean an extra €100 for a Windows license if he really needs it. Then again, his site [3] indicates that his previous computer was a Macbook which he ran Linux on, so I guess it's irrelevant.
[1]: http://www.apple.com/it/macbook-pro/specs-retina/ [2]: http://www.dell.com/it/p/xps-13-l321x-mlk/pd?oc=n0013z26&... [3]: http://volpino.github.io/#home