The Creative Feet fit all sewing machines because of engineering.
IF you want to take feet from one machine to the next there are things to consider:
1) The snap on bar width
2) The foots opening and how it lines up with the sewing machine needle.
Our adapters that are included with each foot make it so some machines that normally cannot share feet, can. Of course all of our feet will fit all sewing machines because of more than our shanks but you may be able to do what you're trying - just use the hand-wheel to see that the needle clears all sides of the opening in the foot before running the machine.