Ketron is the Champ for today's sounding latin styles.

Korg's Latin styles are more authentic to more of their original sound, more along the lines of when they were very popular let's say in the 30's 40's 50's.

Yamaha's take on Latin is more Ballroom type latin, with more lets say guitar parts played by ocherstra parts.

I guess it's all about the type of music you are creating and the crowd you are playing to, and what you can afford