User blog comment:Alpha671/WaW and MW2 fans that play both: Which is worst?/@comment-1079585-20100627044858

Marathon = infinite sprint, Lightweight = 1.07x mobility, Commando = really far lunging, Tac Knife = faster knifing

ExCon = double sprint, Bayonet = kind of far lunging and slower melee

I think the answer is obvious.