I now have the new one and will sell the old one, once I can get around to it - although I'm tempted to keep it and have both. (But can't really justify that sort of extravagance, with MIL having just lost everything in Katrina
Anyway, for anyone else who's considering the new one....
It's quite different. The hood works better for ds, once I can get it on. It's more shaped, and his head doenst slip out. That makes his naps last longer, which was my primary reason for upgrading. However, it's more difficult to get on and off while he's asleep, and it can wake him up when I fiddle with it to get it over his head. However, it snaps on rather than velcro, which I prefer, as my dds were always playing with the velcro straps and pulling on them.
It's cushier round the legs, but that does make it harder to get him into it on my back - positioning has to be more accurate as I pull the straps up.
The hood tends to slip out the pocket, which is smaller than the old one. I havent used the zippered pocket yet, as I'm not sure I can get into it with him on my back. However, I bought the pouch, which is infinitely better than the old one. It has separate compartments, velcros on and off, and has a strap so you can use it as a shoulder bag if you take the carrier off.
I was sad that they discontinued the fabric bag to keep it in, although I didnt use mine as the carrier is in use all the time anyway.
There's no little pocket for credit cards on the waistband - I dont know why they discontinued this.
The straps are not quite as comfy, maybe because of the extra clips there (I think for the hip carry) - or maybe I just need to break it in more.
Anyway. I am still in love with Ergo. Both designs are great - it would be wonderful if you could mix and match the features that you like though.