No and yes, if you use the ISO Enter + ISO left Shift + more from your old keycaps set it gonna work.
But are the colors the same?
To solve this problem I bought a ANSI k-board (have 3 now and number 4 is on the way) .
If you look/read at the description side it says that the Purple set will not have a ISO Enter but the rest of the sets will have it. Very strange, why include a ISO Enter when you need the ISO left Shift + more for use it on...