Unigine Superposition Benchmarks 1080p Extreme. Here you can place your benchmark for sciene:  

Razer Blade 15 with Evga xc 2080
Razer Blade 14 2017 with Zotac mini 1080ti and evga ftw2 1080
All benchmarks is with Razer Core V2

Lenovo T480s i7-8550U. Aorus Gaming Box with GTX 1070.

My eGPU GTX1060 6GB result

System
DELL PRECISION M4400
OS: Windows 10 home
CPU: Core 2 Extreme QX9300 3.60GHz
RAM: DDR2 8GB
Storage: 240GB SSD
eGPU: GTX1060 6GB
Driver: 411.70
eGPU Gear PE4C v2.1
1920x1080 External display

PCIE 1.1x1
Score 2210

PCIE 1.1x2
Score 2314

I am quite sure this will be the eGPU record for a long time. Please not, that the Superstition Benchmark is the one and only 3D-Benchmark in which the RTX2080Ti shines against the GTX1080Ti. In some games, especially nVidia optimized games, it's not better at all.

15-inch MPB 2018 (TB3)
Asus XG Station Pro
Asus RTX2080Ti Dual OC

Score: 8372

iMac 4k 21.5 inch (iGPU only) TB2
Aorus Gaming Box 1070

Desktop running at 1152p resolution. 
Power plan settings: Maximum Performance (CPU minimum/maximum power state: 99%/100%)

1080p Extreme (Internal Display)

8k Optimized (Internal Display)

MSI Afterburner Settings

13-Inch MacBook Pro 2018
Nvidia Geforce RTX 2080 FE
Razer Core V2

1080P Extreme Score: 6619

27inch iMac 5K 2017 (TB3)
Sonnet eGFX Breakaway Box 550 (modded)
 EVGA GeForce RTX 2080 Ti FTW3 ULTRA GAMING

Score: 9085 (I have also seen 9114, but forgot to do screen cap)

As @OliverB mentioned before this benchmark which is more gpu specific will be shining against pascal card, and I add some proof with Rtx 2070 beats my previous 1080ti I posted earlier. Both on Blade 15 6 cores cpu and Blade stealth dual cores cpu since it’s not really cpu bound.
This is so far the most impressive gpu in term thermal, take a look at gpu temperature and usage on high 90ish after running multiple this stress benchmark, never leave 60ish temp marks.