If I understand your question right, you are asking about something like this:
in reply to Re^2: Does this ctor make sense?
in thread Does this ctor make sense?
and, you want to know if "$this" is the same as "$other".
my $this = bless $other, "ClassName";
From "perldoc -f bless",
...it returns the reference for convenience
So - Yes - it is the same, and No - it is not necessary to capture the returned object from 'bless'.
Most people believe that if it ain't broke, don't fix it.
Engineers believe that if it ain't broke, it doesn't have enough features yet.