as with any wood- the amount of figure in maple varies within a species. the more figure - the more it costs- just like walnut

from my experience curly = tiger in the maple world-- hard/sugar or soft/red - some use one term some the other

this guy carries some great wood not just maple- and explains his grading system

http://www.dunlapwoodcrafts.com/Gunstocks.php

this is one of his his grade 4's