I'm guessing that you can load styles from disc. Here is a quote,"Expanded selection of new music styles, including new dance sounds (56 styles on ROM, plus 8 on Flash ROM)" This would suggest 8 styles can be loaded. I saw a question from someone asking if he can convert .mid to .stl files for his EM50. I don't know if you can load directly from disc. Make sure it can do this before you buy the EM50. IMO Roland styles are not as good as Yamaha styles, so would be great to have new styles.
Starkeeper