I'd get the 1060 combo, unless you know for a fact you have a specific use which requires 16gb of system ram. While some games might use more than 8gb, they don't require it. Meanwhile, all games will benefit from the extra performance a 1060 gives you over the 1050 Ti.
The only bizarre aspect to this issue is the price of things these days. Both videocards and DDR4 ram are ridiculously expensive. If you buy the 1060 you are going to get gouged on the price of that, but if you get the 16gb ram you will be gouged on that too.