Higher rank of devil fruits

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.