That's probably the difference of autohinting vs native hinting. Could you try "sudo dpkg-reconfigure fontconfig-config", use autohinting, and compare again.
-- [Edgy] font hinting does not work with libfreetype6 v. 2.2.1 https://launchpad.net/bugs/54776 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
