The main windings are identical but the hold winding is both higher
gauge and over four times as many windings, you may find that the
flipper has no hold at all (the return springs overpower the hold coil
completely) or could be weak enough that balls hitting the up flipper
can easily bounce it downward. You could temporily slap it in there
with some alligator clip jumpers and try it but you might as well get
the right one.
Thanks for the response, when I installed the /34-4500 coil it had no
hold at all so that explains it.