Thank you for that info, it was very usefulWow. Who pissed in your cheerios?
Sometimes it really is hard to find what you are looking for via a search.
Anyway, as it has been stated, the MX helmets are going to be made for higher speed impacts. These, of course, are the one you are trying to protect yourself from. So....that leads us to one conclusion. Before you buy either helmet, try to get a peek at an MTB full-face, and an MX full-face. The MTB ones look like a total joke. They are like a basic XC lid with some extra plastic crap down near your cheek bones. Said crap is barely even shock absorbing. In most cases it appears to only be padding.
I am going to take this moment to point you to this guy. --> http://www.rockgardn.com/items/helmets/blacklite-detail.htm?menu=helmets
After much researching I felt that the RG helmet met the criteria I was searching for.