Even if people who pressed the blue button have a majority, a random subset of them dies, exactly as many as the number of people who pressed the red button.
So now pressing the blue button is much more risky, but on the other hand you can't argue that your single vote can't change the final outcome and so you may as well press the red button to be safe, because if it turns out that you are in a minority with this choice, then you're undeniably responsible for one person's death.
What do you think would be the outcome in this scenario?
Edit: Apologies for annoying anyone fed up with this topic and thanks for all serious responses. Looks like there is no consensus about the outcome, just as in the original scenario, since there are both predictions of more blue choices and predictions of more red choices. So I guess the modification pretty much reinforces one's existing stance from the original version.