Differences between alter system switch logfile and alter system archive log current

Alter system switch logfile is a force log switch. It does not necessarily archive the current redo log files. (If the file is automatically archived and opened, the existing redo logs are archived. If the file is not automatically archived, the current redo log is not archived .)
Alter system archive log current is to archive the current redo log file. If automatic archiving is enabled or not, a ORA-00258 error is reported.

The main difference is that
Alter system switch logfile performs log switching on the current instance in a single instance database or RAC.
Alter system archive log current performs log switching on all instances in the database.

Generally, all RMAN scripts write alter system archive log current, because RMAN can back up and archive logs. Alter system archive log current so that all archives can be backed up.