The haphazard way the anime portrayed the group suicide part always annoyed me, I definitely appreciate how they took a subject like suicide more seriously in this manga adaptation.
I like this manga so far but if I were in their situation I honestly would just kill myself or something. The idea of being one of the last remaining people on Earth and especially in this manga's world is really scary and depressing to me.
I like this ending better, the end of the anime adaptation left me feeling so empty like it didn't reach any kind of a conclusion. Such an unique series, it's hard to not love it.