KMD has optional privacy. Though It is not required. So it is not a privacy coin at all but a coin with privacy as an option.🙅♂️
That would mean Zcash isn't a privacy coin either.
Komodo - is one of the safest and dynamically developing projects currently. This coin will use the best privacy technology available.
what distinguishes KMD is different from other privacy coins like ZEC and MONERO? so you say that is better than others
On Reddit you find a good discussion about comparison of Komodo and Monero. There are some really interesting posts and opinions which could satisfy your question.
https://www.reddit.com/r/komodoplatform/comments/7fpv82/komodo_vs_monero_coin_perspective/Komodo is in many parts a fork of ZCash (correct me if I am wrong).