Ben would rip Logan to pieces. Logan always has someone to do the dirty work for him. Ben has been offing people since he was a kid.
Logan is a sleezeball, dealing with politicians and flunkies. When confronted by Bauer, he broke down like a punk.
Ben deals with a black-smoke-monster-of-death, scientists, mercenaries, time travel and immortals. Logan would be like a mosquito to him.