Ulster, who are currently fifth in the GUINNESS PRO12, then conceded 22 unanswered points to suffer defeat in their opening match of Pool 1.
Saracens have played one game more, securing victory over Toulouse in Round 1, and Kiss said: "It probably puts Saracens where they will feel comfortable with where they are heading in the competition.
"You have got to look at it and say what do the two Oyonnax games give us? We have not played them yet, we are a game down in the competition.
"Saracens have to travel away to Toulouse, we have them (Toulouse) home and away next and those two games are pretty defining in the whole mix of things.
"It was a typical Saracens display and full credit to them, they hurt us the way they can hurt teams, but when you yield four tries at home that is a bad place to be.
"The first 25 minutes we put ourselves into a 9-0 situation and it was going to plan. But there was a ten-minute period when we did not manage the game at all.
"The try made it 9-5 and gave them the lift they needed and something to work with. In the second half we failed to put any extra pressure on them and they were never threatened by us."
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