I have the "Go". Chatfield is correct in that the "Studio" model is quite a bit more expensive. It also takes up a lot more space in the sewing room.
If money and space hadn't been issues, I would have liked to have bought the "Studio", because there were a lot more die options for that model at the time. However, Accuquilt is bringing out more and more die for the "Go", which I think it is probably more than adequate for most home quilters.