BM 730 Ares and Emerson's Commander are designed for basically different fighting techniques. Ares is much better for fast precise stabbing (BTW - the best defensive techniques in my honest opinion), however Commander is designed for slashing which is much better in action films than in real world (just my opinion).
Quality is comparable if not on BM side.
Ares is lighter and more comfortable to carry.
Ares has Axis Lock - no one liner lock can compare it in strength and reliability.
Ares costs almost 1,5 times less.
Commander is somewhat faster. But think about 0,2-0,3 sec difference in knife preparing time - are you sure it is essential for you? For me - nope (just my opinion again).
Ares with symmetric blade grind is better for daily tasks, I can't to imagine the knife use for tactical purposes only.
I'm voting definitely on BM 730 Ares!
Or if you want to have the fastest and the strongest knife with similar weight and blade dimensions - go with BM Nimravus Cub.
[This message has been edited by Sergiusz Mitin (edited 04-05-2000).]