Note that (from the question), if white wins, white will always have more moves than black.
Win: White. Then, White > Black.
If Black wins, the number of moves of both white and black will be the same.
Win: Black. Then, White (moves) = Black (moves).
Why? Because, white cannot have the last move and lose the game (from the question). And white always starts so it will be WB WB WB till blacks last move.
If it is a draw, either of these possibilities exists.
Win: Draw. White > Black
...
Win: White. Then, White > Black.
If Black wins, the number of moves of both white and black will be the same.
Win: Black. Then, White (moves) = Black (moves).
Why? Because, white cannot have the last move and lose the game (from the question). And white always starts so it will be WB WB WB till blacks last move.
If it is a draw, either of these possibilities exists.
Win: Draw. White > Black
...