[throwaway675309]

Guitar pro doesn't have as many features but it's a much better tool for rapid prototyping when you don't have a complete concept of the score in your head. It's easy to make continual changes on the fly using your keyboard without having to worry about the reflow, whereas muse score is incredibly stubborn about making sure that you have exactly the number of notes and durations in each bar.

When you're in a draft mode where are you just wanna be able to create it can be incredibly obstructive. I actually do a fair amount of prototype musical work in guitar pro before exporting it out as music XML and importing it into MuseScore for final typesetting.