1. Rectangle shape instead of oval - fits so much better in cabinet/on countertop.
2. Non-stick insert instead of ceramic. 
3. 14-hour max cook time as opposed to 10-hour. Great for roasts.
4. Multi-function - not just a slow cooker! Can roast a chicken in it!
5. Elevated roasting rack included.
6. Easy-to-see timer window.
And so much more! 
It's fairly new, but I've used it three times already. Love it.