Zen Cart vs osCommerce

Hi Zen users,

I've created 2 successful websites with osC. After full customization and hours upon hours of hacking - I've build some pretty solid osC stores which suit my clients perfectly. Then I found Zen Cart...

Zen Cart seems easier, out-of-the-box, but there's still a ton of customizing I'm seeing. My question is: is there a comparison chart of some sort as to what Zen vs osC does/doesn't do?

The core seems more solid in Zen. Compatibility seems solid also if I wish to move my currently osC clients to Zen in the future. And of course the templating system is the first hurdle. I used STS with osC. I'm currently not finding a easy solution for templating in Zen. Is it truly easy?

I'm used to using Joomla also. So I combine Joomla and osC regularly. Right now, I have an awesome Joomla template that I want to now convert to Zen for a live site. Thanks for any help!