my suggestion for the Ryzen 3 series is at least 3600Mhz. for ryzen 2 3200, and ryzen 1 3000. depending on your board XMP settings you might be able to go faster but 3600 seems to be the sweet spot for R3 series.
RAM is one of the cheapest upgrades you can do and I suggest getting as much as you can afford. I would go with the 32Gb kit.
as to the CL (Column access strobe Latency) you can only compare CL in the same speed. you cannot compare 3200 CL14 to 4400 CL21. CL is measured in clock cycles and the more cycles available the more the CL, its a law.
get the lowest CL in the Fastest speed you can afford in a matched kit.
if you get 3200, get the set with the lowest CL available in that speed that you can afford
if you get 3600, get the...