Cortezia might be a headshot demon but yday against FURIA when the other guy was crouching, doing AD or when he missed the first shot he used to die, he's also a lurker so if half of his kills are lurking, already 50% of his kills were an instant headshot, so its not like he's god. Boostio is totally different, he doesnt give a fuck about KD he only wants to win the match and do the right calls while standing next to his team. Both are really different players it just depends if you want an IGL or a good sentinel.