You could cheat and normalize and then convert the revision on the left side into all potentially matching revisions and then check whether the right side is one of those:

• 2.10
• 2.*
• *

#!perl -w

use strict;

my $left = '2.10';
my $right = '02.10';

sub normalize {
    # just strip leading zeroes
    my ($ver) = @_;
    $ver =~ s/^0+//;
    $ver
};

sub candidates {
    my ($ver) = @_;
    my @res = normalize $ver;
    (my $minor_wild = $ver) =~ s/\.\d+/*/;
    push @res, $minor_wild;
    push @res, '*'
        unless $ver eq '*';
    @res
};

for my $right (qw(2.0 2.1 2.10 02.10 2.*)) {
    print join("\t", $left, $right, (grep { $right eq $_ } candidates(
+$left)) ? 'equal' : 'inequal'), "\n";
};
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