
Not 100% sure without seeing pictures of the watches but the excessive height of your movement is most likely just the plastic movement spacer ring. The movements for all the 9021 and 9025 variants are all basically the same size. When you take the movement out of the watch there is a plastic ring that runs around the movement (usually white or orange). On the top of this, on the front side is a round bit moulded in that locates the top of the movement in a similar indentation in the steel case. The length of this round bit varies between cases and the respective plastic rings fitted to their movements. Assuming this is the problem then you could just switch these pieces of plastic over from working movement to non-working movement. Plastic ring is easy to remove, no screws, just manipulation - off the back, away from the LC panel side.
Putting odd backs on odd watches is no bueno.