GUP ruleset question

Hi, 

what's the right way to config a list of GUP's?

I saw customers with config's like this with 1 rulesets for each IP:

and like this with many ips in one ruleset:

https://youtu.be/hHiBat6QIoU?t=215

in this video the GUP is configured like the first screenshot.

Both seem to be working the same way at first sight.

what's the difference and what is the right one to use?