Cafu in his prime was the beastest beast ever, everywhere. Roma, Brazil, Milan. Even better than the best Dani Alves or Maicon in 2009-10. For sure the best FB I've ever seen playing. He had timing, shooting, stamina, speed, passing, defending... And was also quite classy and cool on the pitch. No wonder someone consider him the best RB in history. Always been a fan of him, TBH, even if he was in the team of shitdogs that stole us the Scudetto in 2000-01.
Lahm is great and if we judge performance-wise, he was probably one of the best players in the world in 2013, if not the best, and has had a great World Cup for sure, but he's not at his levels.