If you're going to beat it up, get the Nighthawk. It is one tough knife and, with E2K, tough to beat as a cutting tool.
The Ionfusion special is sharper and will hold it's edge longer (much longer) under normal conditions but, if the metal supporting the edge is damaged the ionfusion coating won't be much help.
The edge is a chisel grind and, while it will cut for a long time if used for cutting meat and skinning and butchering animals, I just don't think that it would stand up to serious chopping or any activity that might put dings or chips in the base metal of the edge.
The Nighthawk, OTOH, will stand up to almost anything. As I said, it's one tough knife and if SMKW is selling them below wholesale, that's the way I would go.
What the heck, get one of each. You can get them both for less than what I'm selling the Ionfusion 119 for.
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Dennis Wright
Wright Knife & Sporting Goods
La Mesa, CA
1-800-400-1980
wrightknife@ixpres.com
("Have a knife day!")
www.wrightknife.com