Kill points aren’t linked to Team Power. It is instead linked to the total HP of the defence team in relation to the total HP of the entire alliance (including troop modifiers).
So basically the calculation is:
Victory Points (not bonus) = 1000 / ([Team HP] / [Alliance HP])
Then the “bonus points” are half the Victory Points.
In your example/ screenshots, as the two defence teams are not on the same team, their relative Health Points means nothing. And relative Team Power doesn’t mean anything anyway.