User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-75.235.55.224-20121203050934/@comment-27.110.241.48-20121204021014

Well I read it in this FAQ:

http://www.gamefaqs.com/psp/991479-monster-hunter-portable-3rd/faqs/61837

That's like 300% more elemental damage for the second type of GS charge attack! :D