I have a sport, love it, but I didn't use it til DD was 12 months+. The sport is 20% lighter than the Original.
The original is the same shape etc as the Organic, so for me the organic wins every time. Why buy plastic when you can get organic cotton?
Any reason why you didn't use it with your DD till she was 12 mths Lime? She didn't like it? I love the look of the green organic Ergo - at the top of my list thus far, unless I can be convinced otherwise .

I've seen the performance - but haven't really looked into it.