I think it’s clear what the difference is. nb-rpchat only has these commands
/ooc /o text
/close /c text
/me text
/whisper id text
/local /l text
/b text --local ooc
/shout text
/do text
My script has way more.
Further more, they clearly have a different look to them.
If you want to go for a free version, i think their product is a pretty good starting point. But my script offers way more, including esx compatibility (With names, jobs, and more), which is not a feature in their script.