Difference between use of rpm -q --changes and --changlelog

I can’t understand the difference between rpm -q --changes and rpm -q --changelog in their use case?

As I understand --changes prints full timestamps, but what is its use case?

See man rpm where it documents the options:

PACKAGE QUERY OPTIONS
–changelog
Display change information for the package.
–changes
Display change information for the package with full time stamps.

FYI I only see 12:00 and 13:00 for the time (likely timezone change explains the difference).
I suspect the time is not meaningful.