yep, definitely the same guy. It is just very inconsistent.
That doesn't make any sense though. The guy that recorded the lines isn't "voicing" a character, he's just talking. He's not trying to be consistent, he doesn't have to be. He's not acting, he's just reading lines. It's like James Earl Jones doing Darth Vader. He doesn't have to
try to make that voice, he just does. It's his normal speech.
Thus, him being inconsistent with himself doesn't make any sense. Besides, most voice actors that do make voices for certain characters find it easy enough to stay in character anyway, even if he was doing a voice. The other 69 actors in this game don't seem to have any problem being consistent, why would the highest paid expert?