Cherry Blossom Impact vs Standard Rasengan

[Spaceboy24]

Sakura Haruno's Cherry Blossom Impact (super strength) vs Naruto's normal Rasengan (no boosts, no rasenshuriken, just the good ol' standard).

Which attack would deal more damage if, lets say, each respective user directs it towards flat ground?

 

[Slug Princess Tsunade]

Sakura's punch means instant death.