The number of rounds in an iterated cipher is wildly different --- in fact, close to the opposite --- of the number of iterations in a password KDF. But: don't use PBKDF2 at all, if this is something you're trying to optimize; scrypt and Argon2 are memory-hard in addition to time-hard.
Good to know. Yes, PBKDF2 is kind of outdated. It's just that ripping it out and replacing with new key derivation algorithms takes time, especially needing inter-operated with other tools, while the iteration count is a simple configuration to bump up on existing implementation.
