Karthus or Vex: which one to play in LoL?

Karthus and Vex on a single page: the data from their champion pages, side by side, to help you choose.

Vex

	Karthus	Vex
Role	Mid · Jungle	Mid
Class	Mage	Mage
Playstyle	Aggressive · Carry	Aggressive · Carry
Region	Shadow Isles	Shadow Isles
Difficulty	★★☆☆☆ Easy to pick up, a few hours are enough to be effective.	★★☆☆☆ Easy to pick up, a few hours are enough to be effective.

In short

Karthus and Vex meet in Mid, but Karthus is played in Mid / Jungle and Vex in Mid.
Both have the same difficulty (2/5).
Both are Mage champions.
Both come from Shadow Isles.

With the same difficulty, choose by the role and playstyle that appeal to you, or take the quiz.

Not sure? The quiz suggests a champion that fits your playstyle.