There's no specified setting so I assume neautral ground. No nexus amp for Vitiate then, and I assume also no prep.
Sidious > Vitiate, obviously
and a very hard fight between Plagueis and Vader, with Plagueis having an edge IMHO.
But this fight won't be decided before Sidious defeats Vitiate.
Team 1 wins.
It isn't a stalemate Vader is comparabe telekinetically, but Plagueis is vastly more agile and faster in combat speed to Vader
Vader also isn't taking Plagueis's brutal applications of TK for very long, whereas, Vader will never get the chance to hit Plagueis given the fact Plagueis is faster/more agile (dodging blaster bolts from hundreds of droids, not being hit by hundreds of Kursid warriors, and appearing as a bolt of lightning in a forest understory). No one is doubting Vader's combat speed here, but Plagueis's agility/feats regarding mobility vastly surpass the chosen one's
Starkiller was described as 'nearly three times faster' than Vader himself and Starkiller could only stalemate him in that duel, he relied on the Force to defeat his master.
So no speed is not taking out Vader, in-fact in almost every one of his duels his opponent is faster but he wins 90% of the time anyway.
Plagueis cannot out-duel Vader, Vader is one of the best duelists the Sith have ever had.
It's a stalemate because their TK feats and endurance feats are roughly similar.
However team 2 loses because Vitiate has literally nothing on Darth Sidious.