I've had both. At the moment I have the sport one, because I was living in Queensland when I got it, and the normal one was far too hot with the canvas material compared to the thinner cotton type material of the sport. Also, DH wanted to wear the kids, and the sport has longer straps, so he can fit into it, can't fit into the standard one. (He is 6 foot 7)

However, the sports one is harder to get on, the straps twist more easily because they are thinner material, and I need help getting it on - mostly because I have tennis elbow at the moment, and can't really move my arm, but they really twist for me and I crack the poos and don't wear it. So I hate my sports ergo at the moment for this reason.. LOL

Also, the sleeping hood on the sports ergo clips onto the shoulder straps, and its PITA when you are by yourself because they can be quite fiddly. On the standard ergo they snap on, which is MUCH easier to do by yourself.

I'm actually swapping my sports ergo with someone who has a normal ergo, because since I live in tassie now - don't exactly get hot weather down here as much as Qld...