the msi should be more efficient and cooler/less noisy.
as soon as you start even just mild oc, the 1070 will be ahead.
most will run around 2GHz without adding V.
the card can easily handle it (power/cooling), so i would get the free boost.
Afterburner: set power and temp to max, priority to power, and the card will go to max (Nv) limits (more or less)...