Also note if you look at the construction of both they are six 8pt-level CSL's with limitations on them (one being 'only for damage'), so you are looking at a 48pt active cost.
Ok, rechecked - deadly blow is six 8pts-lvls, weapon master is six 3,5, or 8pt-lvls depending. You figure though a 4pt +1DC level is 2 3pt CSL with a -1/2 "only for damage" -- 6 active pts, 4 real.