I'm interested in getting one of the Metal Slug games for the PSX or the Sega Saturn.

Now, as far as I can tell, there is both a Metal Slug and a Metal Slug X for the Playstation. The Saturn has Metal Slug.

Is there a difference between Metal Slug and Metal Slug X on the PSX?

Also, I've heard taht the Saturn version of Metal Slug is slightly better than the PSX version of Metal Slug.

So I'm assuming that I should get Metal Slug for the Saturn. Right?