Perl 6 vs Perl 5

Can we have a serious Perl 6 vs Perl 5 thread?

I've been trying to wrap my head around what roles are trying to emulate. Just an odd sort of OO way of programming?'

What else where significant changes?

>>27
You can write Perl 6 in any way you like:
http://perlgeek.de/en/article/mutable-grammar-for-perl-6