Well, you might not do much better than that easily actually. The Dispatch table design pattern can help (you associate functions with some keys) which gives a basic example like that:

use strict;
use warnings;
use feature 'say';

my %operators = (
  '>'  => sub { $_[0] > $_[1] },
  '==' => sub { $_[0] == $_[1] });

sub test
{
  my ($op, $left, $right) = @_;
  die "Unknown operator: $op" unless exists $operators{$op};
  say "$left $op $right" and return if $operators{$op}($left, $right);
  say "$right $op $left" if $operators{$op}($right, $left);
}
test "==", 1, 1;
test ">", 2, 3;
test ">", 4, 5;
test "<", 6, 7;

__DATA__
1 == 1
3 > 2
5 > 4
Unknown operator: < at pm_1208722.pl line 12.
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But if you want your own sentence to be written you'll need a more complex structure where for each key you have either several functions (one to compare, one to print) or a function and a template or something. I don't have the time to go any further than that at the moment though ^^".