in the loading screen at the top you can see whether you and the opponent are evenly match or not, by ladder points, if both teams are evenly match the score will be 11 points only (win or lose),

if you are slightly favored(means you have more points) you will win only 8 points but if you lose, you will lose around 16 points while your opponent gain 16.

and no you don;'t get more points from streak.

bonus pool is points for not playing for a limited amount of time.