A Sword Dancer said:
None of you are going to be able to gloss over the fact that if the planet is destroyed, and it probabaly will considering at least two of these characters have demonstrated a willingness to do so mid fight, boros would survive in space long enough to count a win and none of the saiyans would.
Boros hasn't displayed space survivability either, you can't just assume he'll survive longer, and you're forgetting Vegeta is still planet+ in attack potency, he'd overpower the Roar Cannon, I am pretty sure Vegeta isn't simply going to stand there and let it happen and Vice Versa, that's Dragonball's schtick, Villains run out of options and aim for the planet and fail to because they have been stopped or the planet can survive without it's core for a while
So if the planets destroyed it's likely a draw due to both not being able to survive in space, that's a draw scenario.