Did you even read that review?
Stock boost was 2038
Clocks are definitely difficult to decipher nowadays. I like to learn but I'm not sure the picture is very clear yet. I have a question and a comment:
First, are clocks given in the 3dmark benchmark leak fixed? Are all turbos, boosts, etc. disabled? If so, then a 1630 MHz Vega is performing almost the same as a 1924 MHz GTX 1080.
Second, from the Gigabyte article I linked, all the game benchmark results are performed with the default settings of the Gigabyte card not the overclocked results (we don't know anything about overclocking a Vega).
As shown on the clock profiles page, the clocks range from 1696 to 2038 MHz. I assume they change based on the load and card temperature. The average is around 1982 MHz.
https://www.techpowerup.com/reviews/Gigabyte/GTX_1080_Aorus_Xtreme_Edition/34.html
It might seem that 1924 MHz is very different from the max 2038 MHz because there is a 2 instead of a 1 but the difference is actually quite small (~5.5%). Plus, it is hard to compare a moving clock speed to a fixed clock speed benchmark result. But if we take the average of 1982 MHz on the Gigabyte card (3% above 1924 MHz) and adjust the 3dmark score, you get ~23260. The 1630 MHz Vega received a score of 22330 which is 4% lower. Yes you can probably overclock a GTX 1080 an additional 4% to get above 2 GHz. You also might be able to overclock a Vega 4%. Time will tell.
So again, all I'm saying is that Vega is equivalent to an overclocked (factory or manual) GTX 1080 according to these leaked 3dmark scores.
If we look at power consumption, TP measured 243 Watts peak on the factory overclocked Gigabtye card. Rumors peg the liquid cooled Vega (I'm assuming that is highest score) at 375 Watts. So AMD is getting about the same performance as Nvidia but at 35% higher power. That suuuuuuuuuuuucccccccccccccckkkkkkkkkkkkksss in my book. Others may not care.