I personaly haven't purchased any of them, the latest edition to the collection has rear shafts just like the ones in the center picture.
So far so good.
Just looking at the pictures, the picture on the right does not come with hex's, for the wheels.
The center picture has machined hex's and the left picture has plastic hex's.
I personally would probably get the ones in the center picture.
Although if weight is a concern the ones in the right hand picture may? be lighter?
I know that may not answer your question, but it's a start.
I own the center ones and I love them on my 1:10 Ruckus 2wd brushless. I ended up with a different one for my son's 2wd ruckus from hot racing because I couldn't get the center ones anymore and they are also nice (they are something inbetween the left and center).