CL means CAS Latency which I belive stands for Column Access Strobe Latency. In general terms a kit with higher CL value will perform a little worse than a kit with a lower value, GIVEN the SAME frequency.
1 minute ago, Surreals said:
cl14 is Samsung b die
That is not even close to accurate. 3200MHz CL14 is B-die (nothing else presently does that stock), yes, but 2400MHz CL 14 is very unlikely to be.