JJ - any reason you use your 6.5 reg more than the original?
It is adds less weight to my pack when hiking/cycling/camping and the original is more of a fighting design especially after my mod to it. The original Mil Overrun functions great as a utility blade, but is more suited for a combat zone than a relaxing weekend in the woods.
If I am deployed, I would leave the 6.5 at home and bring the Reg Bayonet. Chances are I wouldn't/won't need the fighting characteristics of the Reg Bayonet even in a combat zone, but I would rather have it and not need it than need it and not have it.
If I could only keep an original non-modified Reg or the 6.5, I'd go with the 6.5 for it's usability and weight.
Hope that helps.