what do you mean 'cutting power'? If both attacks inflict their damage by cutting, and danzou's has greater cutting power, then wouldn't that make danzou's fuuton more powerful?
No because, Danzo's lack range, hitbox, and AoE. So only its better in one category.
If you say FRS has a greater AoE and therefor is more powerful, but less concentrated than danzou's, then i'll ask why you claim such a thing and what would happen to susanoo if it was hit by a FRS?
Same as above.
As for your question against Susanoo: (Since I think Sussano is harder then Raikage) The razor should be able to deteriorate[
You must be registered for see links
] but better Rasengan only. Once it explodes the energy will spread and do just like how Tsunade explained it[
You must be registered for see links
] but on hard chakra. The result will greatly damage Sussanoo, which all that is needed left is to apply another physical force to break through it.
Thats how I see it