I owened both! Still have IJ williams. IJ4 is one of the coolest looking pins out there. But the play and layout stink. 4 movies / 4 main shots. Go look at the inserts for the four movies. 2 lines of inserts line up with the shot while the other two lines of inserts are swapped from the shots. Just plain stupid. Either line the inserts up with the shots or don't. I like knowing that the inserts below a shot are for that shot not a shot on the other side of the pin.....who does that?