What do you guys think is the better Tyranitar Prime Deck tech,
Zoroark or Umbreon UD? Maybe both?
or
Both have their uses and Umbreon UD mainly seems good only against Donphan Prime and Machamp variants while lacking the ability to counter ReshiBoar and Zekrom Donk.
Zoroark on the other hand has two useful attacks, the latter in which can help counter against not just ReshiBoar and Zekrom Donk but also against Pokemon that have a huge amount of damage output at the cost of a DCE.
Zoroark or Umbreon UD? Maybe both?

or

Both have their uses and Umbreon UD mainly seems good only against Donphan Prime and Machamp variants while lacking the ability to counter ReshiBoar and Zekrom Donk.
Zoroark on the other hand has two useful attacks, the latter in which can help counter against not just ReshiBoar and Zekrom Donk but also against Pokemon that have a huge amount of damage output at the cost of a DCE.