Yes, with regards to performance, Nvidia GeForce GTX 1070 outperforms, GeForce GTX 1060 5GB by 55.6% in 3Dmark benchmark.
The GTX 1070 is more energy-efficient considering its performance, having power consumption of 150 watts and a 3DMark score of 6080. By comparing its benchmark score to its power consumption, we get an efficiency score of 41. GTX 1060 5GB's efficiency score is 33 .So GTX 1070 leads by 24.2%, making it the smarter choice in terms of power consumption.
When considering value for money, GTX 1070 offers a better deal than, GeForce GTX 1060 5GB by 40.0%.