(Forgot to login first, :-) Logically they are the same, and even the gracefulness are the same. However there is one situation, I would suggest to use @_ instead of shift, to provide the elegance. That's the time you pass named parms, for example:

sub func {
    %parms = @_;

    foreach (keys %parms) {
        print "parms[$_] = $parms{$_}\n";
    }
}

func("a" => 1, "b" => 2, "c" => 3);
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Well, you can use shift, but in this case, a little bit tasteless, is it?