What maths must be used when determining dividend yields and expense ratios to determine the better of 2 similar ETFs?

Currently planning to self-manage mine and my wife’s Roth IRAs and am looking at ETFs head-to-head like SPY vs VOO, VBK vs SLYG, etc.

How to figure out which is best?

Submitted December 22, 2018 at 10:18PM by Shinthus http://bit.ly/2EKhygj