Registered: 08/03/10
Posts: 85
Loc: Dysfunctional, New York
The top edge of the 15 is sharpened where it is not on the 5. Also, the grind lines on the top go to the hilt on the 5, where there is more flat spine on the 15. Blade width of 5 is 1 1/16" and on the 15 is 1 1/4". The 15 comes with a cooler sheath as well.