Original fictional pairs. No browser compared them.
For these HTTP URLs, an origin is scheme, host, and effective port.
Effective means the printed port, or the scheme’s default when omitted.
The path is outside that triple.

Worked pair
http://127.0.0.1:7000/one
http://127.0.0.1:7443/one
Scheme and host match. Ports 7000 and 7443 differ.

Activity pairs
Pair 1
http://127.0.0.1:9000/notes
http://127.0.0.1:9000/other
The path differs. Scheme, host, and port match.

Pair 2
http://127.0.0.1:9000/notes
http://127.0.0.1:9001/notes
The port differs.

Pair 3
https://127.0.0.1:9000/notes
http://127.0.0.1:9000/notes
The scheme differs. Both lines print port 9000. The schemes still differ, so the origins differ.

Check: pair 1 is the same origin.