My Bushmaster 6.8 has a nice bark that my 5.56 does not. When somebody hears it fire for the first time they are surprised by the bark that it makes. Over all I like it much better in every except one, you can get cheap 5.56 anywhere by the case and 6.8 is rarer to find in quantity and at twice the price.
"Both oligarch and tyrant mistrust the people, and therefore deprive them of arms." - Aristotle,