Made a set of Xbee3 repeaters in cases

So, I have been researching and wanting to build an XBee setup, and I found two posts, yours above and the one below:

I came across this difference between the two posts in regards to the hardware required.

What is the difference between these two models? From a little research, the "J" models appear to be a lower output power versus the models without "J" at the end, I am guessing pro vs standard? There appears to be a lot of XB3-24Z8XX models, and I was just wondering what is the difference between all of them, if you know?