Yes, true, it does depend a lot on the way of playing. I try to keep my soldiers alive, even when they are mind-controlled, I try to not kill them, but stun them and take them home and sack them there.
I rpg XCom as far as possible...
That's why I hate the cheating AI a lot: You plan a careful and clever entry into the UFO, clear the whole outside and BAMM suddenly when you e.g. enter the UFO the aliens know EXACTLY and MAGICALLY where you are? Nope, no longer working for me, it defeats the whole point of being careful and placing your units tactically clever.
I can live with the PSI cheating, it gives you a reason to hurry without being a brute and stupid AI omni-knowledge cheat.
But that alien knowing exactly where my units hide and where to attack without me being able to counter that? No.