Akheel Ahmed <akheel(dot)mailing(dot)list(at)gmail(dot)com> writes:
> in 13.4, order by asc gives underscores higher than other characters.
> all the LC parameters are identical across both instances.
> Am I missing anything else?
OS-level differences, perhaps?
https://wiki.postgresql.org/wiki/Locale_data_changes
regards, tom lane