There is a plenty diversity in information units through the code, command-line options, GUI and logs. Here are some examples:
-dbcache
megabytes in CL and GUI vs MiB in logs and code (constants in txdb.h)
-prune
MiB in CL vs GB in GUI. Also, setting prune = 1 GB in GUI gives incorrect prune target = 1000 MiB.
Which prefix type – binary (a power of 2) or SI (a power of 10) – is preferable in the Bitcoin Core project?