I would go for the G-Skill one because of having the lowest timings/voltage between them.
But many prefer higher speeds,so if you prefer 1600Mhz then i would chose the second one(its has lower timings than the first one)
Yea, so what exactly is the deal between timings and speed? I know that timings are response times, but what does that mean exactly for the speed of a given program? I suppose I'm asking, where does a better speed (MHz) give you a benefit, and where do you see a benefit from better timings?