- There is no difference between the two really. One is a language construct (our()) and the other is a pragma. They both declare package variables (as opposed to lexical variables, which are declared with my(), and don't touch packages) into the current package.
There is a difference between the scoping between use vars qw/ $var / and our $var - This is described in perldoc -f our and described by Sinister previously in this thread.
perl -e 'firstname.lastname@example.org&&&split/[@.]/&&s&.com.&_&&&print'
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