Lmao. Dialga would wipe the floor with both. And I'm not talking about Mystery Dungeon's Primal Dialga, which lost its sanity after the shattering of the Time Tower and was capable of shattering Celebi's time travel path with Roar of Time. I'm not talking about Purified Mystery Dungeon Dialga, which reset the future timeline of the paralysed planet and instantly turned it into a new world teeming with life, as well as having the capability to return the protagonist to life after he was erased from the time stream, either. Hell, I'm not even talking about Manga or Anime Dialga, who live in an entirely separate dimension bigger than the main Pokemon universe, can use their powers to travel back to the birth of the universe and alter the history of reality, freely stop and turn back time, as well as trap Giratina in a loop of distorted time. I'm talking about Daiyamondo Diaruga controlled by Akagi's akai kusari, manufactured from the combined energy of the Lake Trio, which was not only capable of destroying and recreating the entire Pokemon universe with its Toki no Houkou within minutes, but also represents the abstract concept of time, having complete control over the temporal structure of the universe and being responsible for the creation of time itself at the moment of its birth, representing an unstoppable force for anything except the combined power of Mesprit, Uxie and Azelf or Giratina.