Perl JanRain OpenID library

[Martin Atkins]

Dag Arneson wrote:
> A pre-release of the JanRain OpenID Library for perl is now available
> for download.  This module is a port of the consumer functionality of
> our Python OpenID library.  You can find it at:
> 
> http://www.openidenabled.com/openid/libraries/perl
> 

How does this library differ from the Danga OpenID module?
(Aside from the API being shaped like the Python one, obviously.)