Sig or Suisui

Having lost my 50/50 (Encore yet again 🙄), I might not be able to pull for YY weapon and Suisui. I wanted to know if there was any calc showing which on of them was a better investment for YY.

With the weapon I might gain ~20% increase but the Suisui buff sound busted so maybe I should skip

NB : Beautiful YY is currently rocking Aemeath sig in a Mortefi Chisa comp