cant stack the clipboard (only one at a time)... and it doesn't have the pitch scale function... those are the 2 big ones that i hear

you know what? in the next days an sp-505 will come to me, i will see the real thing. for now i can say that sp-505 works better and is better conceived for the editing. it doesn't have sensitive pads, ROLL and you cna apply only one fx at time...that's the main difference with sp-606. autochop is better on sp-505 because you can move and add/substract wave pointers that's not possible on sp-606. for the sensitive pads: you have the accent option on sp-505 so....