Big Mom is like Iron Man, She is like covered in Armor but She is Fragile inside, We've seen that when her Defense was Disabled during Tea Party, so Law attacking her from Inside would deal Extreme Damage. Kaidou is like Hulk instead, that's why Law's Attack from Inside didn't look as Threatening as what Big Mom took.
Law's Awakening didn't grant him New Powers, it simply allowed him to Cast his Abilities from different Sources which allow him to Expand his Options + Reach & Scale of his Attacks,
Shock Wille is same as Counter Shock, it's just that thanks to his Awakening He can Perform it from Distance & unleash it from within his Opponent with his Sword
While Puncture Wille is same as Amputate that Cut Vergo & entire Punk Hazard Facility/Mountain, but performed multiple times, on top of each other covering his entire Room, it's like imagine Room forming a super long Line, and in each point of it, there is Law performing the Cut that Defeated Vergo, that's what Puncture Wille is, that's why it deletes the entire path
So his Awakening allows him to Maximize the Usage & Utility of his Abilities, not change them, basically Guranteeing They Land 100% & Target takes 100% of their Damage, but his Gamma Knife is still his Most Threatening Ability,
Also Gamma Knife doesn't leave any External Wounds, so even if He Performs it with Awakening (Could be named Gamma Wille), it still won't look as Destructive as Shock Wille or Puncture Wille or Awakened Version of Radio Knife ... etc but We know for a Fact that it dealt more Damage than them, because We understand it's purpose