the calculation for this is CAS/Frequency
- the first one is 9/1333 = .00675 seconds, or 67.5 nano seconds. you want a smaller number here, less seconds is faster.
-The other is 11/1600 =.006875 or 68.75 nanoseconds.
some other things to mention here is AVOID RAM at 1.6V, it means it needs more power, essentially an "overclock" to reach those advertised speeds. Any decent new ram should be able to do 1600 Mhz CAS 9, yet alone 11, at 1.5V.
Kingston RAM is excellent, i would go with that. Corsair makes good RAM too, but that stick is not one of them.