So:
2H Astartes Deathwatch Relic Blade = 2d10+7 pen 9 super power field
1H Mastercrafted Asartes Power Fist = 2d10+2+SB extra pen 9 power field, unweildy
2H Astartes Deathwatch Relic Blade: 50 req, hero
1H Mastercrafted Asartes Power Fist: 60 req, distinguished?
At 5 strength bonus the damages are the same. Power fist is unweildy but 1H, and the Relic blade is harder to purchase (slightly cheaper) and has a strong power field capable of destroying other power fields.
Seem wrong to anyone else? I am assuming that the Relic Blade is already best/master quality. If it isn't then the damage could be 2 higher at 100 req, but the power fist can be higher damage with more SB still at 60 req.