Rek'sai or Kha'Zix?

Rek'Sai is amazing. Get Rek'Sai :)

rek for a good tank good engage. i pref kha great ganks and counter jung. easy escapes but kinda squish

What's your playstyle?

They are two completely different champions, they don't have comparable points to draw a comparison between the two, so we can't tell you about that.

Which of these champions did you enjoy playing more? You should buy that one. because anyone else is just going to tell you the champions they like, which says nothing about what YOU find fun in the champions.

kha'zix is hard to play properly..like,really hard to play and make the most out of it..assasins in general need alot of map awareness and experience Rek'sai,you need some practive with the tunnels(i still pres accidently a tunnel and go over walls:)),but he is easy to play,you are a teamfight machine;).You flash w->q->e should get u a kill;)

I would probably recommend Rek'sai since she has more utility (vision, mobility, knockup) and remains useful when behind since she can just build defensively.

Of course, I've never really enjoyed the assassin playstyle and have always leaned more towards bruisers and tanks.

Personal preference is a large factor.

I'd watch a vid of them both and decide which theme you like most and which one you find the most fun :) Personally I would highly recommend Rek'Sai