I recently had a chance to try a variety of multi tools for the only task I need them: wire cutting (everything else is on my swiss champ). All but the ones with rounded edges were nearly worthless. I struggled to get through even a soft metal coat hanger with them because the edges cut into my hand.
Clear winner was the SOG where the gearing meant it could cut through 3 coat hangers at once. Even stil fitting barbed wire into the cutter is going to be tricky.
A BIG advantage of a bayonet is the wire cutter.
The Sock