Throttle springs are the same....because the carbs are the same...just different jetting....etc.
Do you "slide springs....or diaphragm springs" these are the springs that fit behind the diaphragm covers, into the slides? In the pic....they go right where the persons index finger is.
If thats what you mean....stage 7 are shorter, and not as thick, allowing the slides to react faster and pull the needles out of the main jets faster, but since that is happening, it will also make you run richer as well.