1070 Max-Q better card than 1080 Max-Q for many reasons.
Here are some facts.
1060 Max-Q is 11% slower than 1060 Mobile but 53% faster than 1050ti Mobile.
1070 Max-Q is 18% slower than 1070 Mobile but 25% faster than 1060 Mobile.
1080 Max-Q is 12% slower than 1080 Mobile but 0% faster than 1070 Mobile.
1080 Max-Q is only GPU that is not faster than its lower tier mobile GPU.
1080 Max-Q is 18% faster than 1070 Max-Q
1070 Max-Q is 52% faster than 1060 Max-Q
1070 Max-Q has much higher performance jump from its lower tier Max-Q card.
Based on Asus Zephyrus GX501VI and GX501VS reviews,
1080 Max-Q temperature goes up to 80°C on load, whereas
1070 Max-Q temperature goes up to 70°C on load.
In which it gives 1070 Max-Q a headroom to overclock, reducing performance difference with 1070 mobile and 1080 Max-Q, while
1080 Max-Q will throttle if overclocked.
To conclude
Due to the nature of 1080's high TGP, Max-Q version of 1080 has worst efficiency, performing much like a 1070 card.
1070 Max-Q a smarter choice for the Max-Q Laptop for its performance efficiency and better acoustic. [Jan '18nday76]
The GTX 1070 is Nvidia’s second graphics card (after the 1080) to feature the new 16 nm Pascal architecture. As a result of the die shrink from 28 to 16 nm, Pascal based cards are more energy efficient than their predecessors. The GTX 1070 is rated at just 150 Watts. In terms of performance the gap between the flagship 1080 and 1070 averages 25%. Both GPUs have 8GB of DDR5 and although they share the same processing core (GP104), the 1070 has 25% of its resources disabled. Comparing performance between the 1070 and legendary GTX 970 shows that the newer 1070 wins by a whopping 50%. The GTX 1070 has only just hit the market so, at least for the time being, prices are significantly over the Founders Edition MSRP of $450 but Nvidia have stated that they expect third party cards to sell from $379 at which time the 1070 will likely dominate as the value for money leader. [Jun '16GPUPro]
We calculate effective 3D speed which estimates gaming performance for the top 12 games. Effective speed is adjusted by current prices to yield value for money. Our figures are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top GPUs. [GPUPro]
Welcome to our PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best value for money upgrades.