^I wouldn't say there was no difference made in the first by being underwater, there were leaks and sounds and slightly flooded rooms, which made it feel like there was some danger to being underwater.
While in the second you did get to experience being outside in the water, or flooded in a torrent of water there felt no danger to it, it didn't really add to the atmosphere, it was just window dressing.
While in the second you did get to experience being outside in the water, or flooded in a torrent of water there felt no danger to it, it didn't really add to the atmosphere, it was just window dressing.