1. 5402 is the original genta design while 15202 is sort of reissue 2. Bracelet in 5402 is slimmer and even more comfortable than 15202. By far. It compares favorably with 3700 bracelet 3. 5402 is more appealing because of its age. Blue/gray/tropical. We can’t expect that from 15202 since it is new.