Do you miss something on BrainKing.com and would you like to see it here? Post your request into this board! If there is a more specific board for the request, (i.e. game rule changes etc) then it should be posted and discussed on that specific board.
But thats the whole point of these 2 game matches, so you can play one of each colour and the whole outcome could be a draw. Its especially good for games where one colour has an obvious advantage, like maharajah chess for example.
If you want separate ratings for each game then send 2 separate invites, one for each colour.