I saw this discussion on the link below, so I'd like to bring it here. In many of the SB video games, Clancy Brown (the original voice of Mr. Krabs) doesn't voice the ol' crustacean. In those cases, one of the men in the title fills in for Clancy. Of course no one can do a Eugene like he does, but which do you prefer? I think Bob captures more of the pirate talk, while Joe's is a little more calmer. But Bob's is definitely closer to Mr. Krab's tone.
To listen to the differences between voices:
http://www.behindthevoiceactors.com/voice-compare/SpongeBob-SquarePants/Mr-Krabs/
To listen to the differences between voices:
http://www.behindthevoiceactors.com/voice-compare/SpongeBob-SquarePants/Mr-Krabs/