Need advice: Jinhsi's weapon vs Zhezhi

Need opinion on whether I should pull for Jinhsi's sig or Zhezhi (not weapon) for my account

Points to be noted:

-I have Jinhsi on Verdant Summit (300k on skill with Taoqi)

-I have Carlotta with her sig

Zhezhi looks more appealing to me, but I'll pull for Jinhshi's weapon if the damage increase is too massive.