When I first looked at the specs I said to myself "Wow that seems stupid, 4k on a laptop" 4k even on a 27" is overkill. The icons get so small and requires the tweaking of windows settings. And even desktop SLI struggles to keep up with 4k.
I still think Clevo make the best platforms and I'm a Sager fan. Sager pros over the EVGA:
1080p IPS GSync panel, color backlit anti ghosting keyboard, soundblaster XFI audio with headphone amp and foster speakers/sub, Full desktop Geforce 980 or SLI 980m, fingerprint reader, nicer chasis, better cooling system, better thermal compound, killer NIC. The rest is pretty much similar with the sager having the advantage of being customizable. You can up the SSDs, get some raid going, etc....
I've owned sagers and never had an ounce of trouble.