Championship Edition mops the floor with Hyper nonsense and Super is far more entertaining than Super Turbo.
Samurai Shodown games are all over the place in terms of quality. The most popular at this point in time is probably V Special, despite being a sterile generic quantity over quality entry. After that is Samurai Shodown II, which is the oldest game to be played consistently (and technically the best despite needing some revisions). Beyond that there is a lot of love for Samurai Shodown IV’s balls to the wall offensive gameplay.
The original Samurai Shodown has aged poorly and most players despise Samurai Shodown III and vanila 5. Nobody gives much of a shit about VI and all its many subsystems.