Bigger pair of disappointment bros that fizzled into duds in the pros: Chudinovs or Falcãos?

Given what decorated and well-regarded amateur boxers all four men were, and the hype surrounding their debuts, it's remarkable how flat all their runs have fallen. But which sibling tandem feels...

Bigger pair of disappointment bros that fizzled into duds in the pros: Chudinovs or Falcãos?