D: About the powers from the Dressrosa Arc that Doflamingo's officers have... are they pretty much just improved versions of the abilities that the Baroque Works members had (so like Ton Ton → Kiro Kiro, Beta Beta → Doru Doru, Buki Buki → Supa Supa, and Pamu Pamu → Bomu Bomu)? from TaokaS43
O: It's true that "superior" devil fruit abilities are a thing, but as of now, it's pretty much just these four pairs.
(Ton Ton > Kiro Kiro, Hie Hie > Yuki Yuki, Magu Magu > Mera Mera, Buki Buki > Supa Supa)
Though there are other fruit pairs out there that might make you wonder don't they pretty much do the same thing?, these abilities tend to be headed in different directions in terms of how they actually work or what they can do. Also, a superior ability does not necessarily equate to the character's strength. No ability alone guarantees victory in combat.