1600mhz is faster than 1333mhz. You want to keep your latency as low as you can, but when you move to higher speed RAM, you latency is increased. But at that level, it does matter between 9 and 11 for CAS latency.
Here's a very brief explanation of how timings and frequency work, so you have the info to figure it out for yourself.
The "1333" is the speed in MHz...otherwise known as cycles per second. so it takes 1/1333rd of a second to complete one cycle.
The timings (9-9-9-24) tell you how many cycles it takes to complete each kind of operation.
So to find the "Theoretical" speed of the memory would be 1/(speed in Mhz) multiplied by (CAS Latency timing)...lower is faster. (Again that's a theoretical max limit, some applications respond better to higher frequencies, some to tighter timings).