Got the 9310 dev edition as well. With 32GB of RAM, the biggest CPU and the touch screen (not 4k). However, since I wanted US keyboard layout (living in EU) & ordered via my employer, I had to go through our sales representative anyway; but I think I could configure it like that on the website (sans keyboard layout).
That said, I'm not too happy with the Linux support in our model as well. I replaced Ubuntu with Arch (was the plan anyway) and had to fiddle with the fingerprint sensor, plus the WiFi is not suitable for pentesting (but worked out of the box on Arch). Bluetooth causes lockups, so I disabled that (maybe fixed with recent kernels?). Not exactly what I expected from a laptop that's sold with Linux. Next one will probably be not Dell.