The timings are how many clock cycles it takes for each timing to happen. Since there are more clock cycles in each second in the faster 1333MHz RAM it's slightly higher latency is actually pretty similar in nanoseconds.
Anyway, here is a better kit. Get two of them for only $59.98 and it is 1600MHz, so its a little faster than the two kits you're looking at. Your second choice has been deactivated in newegg so it's not an option.http://www.newegg.com/Product/Product.aspx?Item=N82E16820231428