Power, Temperature, Noise
It's worth having a quick peek into the cards' non-gaming credentials as they pertain to power, temperature and noise.
What's interesting here is that the 120W TDP, supposedly common between the trio, isn't reflected in our tests. The GTX 1060 and GTX 1660 Ti get closest to the wire.
Another facet is size. There really is no reason why any of these cards should occupy more than a Mini-ITX form factor, and even then, they ought to be relatively cool and mostly quiet under load. Anyone building a large card - 300mm long - really needs education in product positioning.