Anecdotally, I've got Fedora on mine, and I noticed a huge difference in the trackpad responsiveness when I switched from the Synaptics driver over to libinput. Palm detection got way better, for one thing.
But keyboard on my dell is leagues ahead of mbp hands down.
Touchbar MBP's keyboard is a huge downgrade and I agree that the XPS 13's keyboard is superior. I have no idea why Apple ruined one of the best keyboard in the industry with the Touchbar range.
Not wanting the cursor to stall and then jump around is not personal preference though.
Gestures work perfectly, the cursor never jumps around either - unlike other laptops with crappy touchpads.
[1] http://www.alphr.com/laptops/1002278/dell-xps-13-vs-macbook-...
[2] http://www.itpro.co.uk/laptops/21797/macbook-pro-15in-v-dell...
The only place where the XPS 13 is inferior in terms of build quality, so far as I can tell, is coil whine. I believe they've fixed that in the most recent versions.
Also, even though it's not a big deal I'd rather not have a touch screen at all as I do on the XPS. It's useless, and registers touches when I close the lid (I prefer not to suspend if I'm just walking from one room to another)
Edit: I should note I use Ubuntu exclusively on the XPS 13. I don't know what the trackpad is like in Windows. Presumably it's comparable.
Also my XPS13 is 2 years old and the "carbon fiber" cover started to disintegrate along the edges. The screen hinge is a bit loose so it wobbles a bit with movement.
Other than that it's fab :)
The general shoddy build quality of most manufacturers, combined with the fact that Apple would likely sue the pants off of trackpad "clones", is my reasoning for why all other trackpads are just functionally absent when compared to Apple.