The Higher Rank of Devil Fruits According to Oda

D: The powers of the Donquixote executives in the Dressrosa arc…”ton ton -> kilo kilo” “beta beta -> doru doru” “buki buki -> supa supa” “pamu pamu -> bomu bomu”, are they of a higher tier than those of the Baroque Works members?  Taoka S43

Oda: Powers of a higher tier exist indeed, for now it’s the following 4.

ton ton > kilo kilo ;

hie hie > yuki yuki ;

magu magu > mera mera ;

buki buki > supa supa

And there are some more of the same sort, and such that are rather doubtful, but it’s also a question of who is using the fruit and how. And the strength of a fruit doesn’t equal the strength of the character.
You can never know which fight will occur, and how it ends.