Besides seeing it differently because I was kayaking, Milford is quite different from Doubtful. If you take a look back at my pictures from Doubtful Sound, it's wide open with fairly gently sloping mountains. Milford, on the other hand, is much more closed in, narrower, with steeper mountains that dive straight into the water.
Sunlit mountains lining Milford Sound
I think what amazed me most about both Doubtful Sound and Milford Sound—indeed, of all that I saw in Fjordland—was mountains with water all around.
Clouds hiding Milford Sound
It was quite a departure the mountains that I'm used to as a Canadian (and that I'm seeing on the television a lot right now).