Depends on how you knock them out. If you bust them out together, then they all receive the same rank (8th). Thus, for the purposes of formulas, each player's rank variable (or r) will be 8, and thus the points will also be the same.
But you can also bust them out separately if you want them ranked separately. Just bust one player out and then immediately bust the next player out. Personally, I like this method because I feel in most situations one of the players should probably be ranked higher than the other. Such as when one player had more chips at the start of the hand. Of course, in your example both players most likely would have had the same number of chips.
There's a third option, but it probably doesn't buy you much. Whenever you bust players out at the same time, all of the players busted out are part of a "chop". Chops usually occur near the end of a tournament (mostly as the last act in a tournament) when the players decide to end the tournament and divide up the prizes a little differently. But internally, the TD software always creates a chop when players bust out at the same time, even when no prizes are involved. You can edit the chop (on the Prizes tab) and change the player rankings. To use your example, you could modify the chop so that the players rank 8th, 9th, and 10th instead of all ranking 8th (or change it so that two players rank 8th and one ranks 10th, or change it so that one player ranks 8th and two rank 9th).