Kassadin or Twitch late game?

Who do you think has the stronger late game of both Champs? (With 6 items)

I would say Kassadin, because on the one hand magic resistance builds rather less than armor, and on the other hand Kassadin is provided with much more mobility. Also, Kassadin has more utility than Twitch. Once caught, Twitch is dead, and Kassadin escapes.

This is not clear because when it comes to team fights it definitely twitch 100%. With the correct positioning, Twitch can decide on a complete teamfight within seconds and thus play the game.

in a 1 v 1, twitch and almost every other player has no chance against kassadin lategame.

A fed / lategame Twitch is terrible. It is incredibly exhausting to arrive against him. The opponent can simply engage you whenever he wants, because the rat can just wait and then mow your entire team with his dirty cult.

It also prevents you from effectively making objectives, it's terrible.
When I see a twitch, I live on its lane. I have this need to knock the rat.

~ Nodeti

We have a very clear Twitch hater xD here. But thanks for your answer.