What you may find, depending on the scale of the deformity, is the long fins will slow the Leopards down relative to the Zebras, or they will, at least, have to work harder to keep up.
i have leopards and zebra danios and they get on just fine,the leopards chase the
zebra's but no harm is done but some days the tables are turned and the zebras get there own back(funny to watch)