Major differences I\'ve seen are:
#if, #unless, #with, and #each
I feel that one of the mentioned cons for "Handlebars" isnt' really valid anymore.
Handlebars.java now allows us to share the same template languages for both client and server which is a big win for large projects with 1000+ components that require serverside rendering for SEO
Take a look at https://github.com/jknack/handlebars.java