Weapon base dmg wont change pdif, thats only affected by str and att (or def down).
Considering the % of white dmg given up, and the % of dmg received, you would give up about 25% of white dmg for +80% of rudras dmg.
Given how strong is rudra, and how much relevant its for total dmg (around 60% of total dmg), centovente is a decent option IF youre acc capped. Biggest problem here is acc, if miss a lot your offhand, all your tp you have "bonus", you could earn it with an ilv dagger.
Spreadsheet shows centovente beating others options for anything you are acc capped. But its hard to say of its a viable option for high event as you would require acc buffs for centovente to be worth, so its not just comparing weapons, but comparing weapons+buffs (for example, whats better, izhiikoh+jugo+rcb+minuet or izhiikoh+Centovente+sushi+madrigal?). And finally, using centovente implies a certain style, where you should ws at most 1750tp otherwise you are losing dps. Sometimes you just need one ws closing a skillchain, so centovente advantage reduces as you should start with 3000 anyway. Or for stuffs like dynamis or salvage fodders you can end with a single ws even at low ftps.
Centovente can be useful if used wisely. But be prepared the trials are super boring. I build a machera for sword tp bonus 1000 and after the trials becomes 500 kill with ws eacg trial, you start wondering if its worth a situational dagger like centovente.