I'd say SAO, personally I prefer Sci-Fi and anything that count as a futuristic technology. But I do like AoT, specially for the story and the theme itself, It's just awesome.
Art is the only serious thing in the world, and the Artist is the only person who is never serious.
SAO has a great feel with its SiFi approach but, id rather take Attack On Titan because every episode and reading the manga always has me on the edge of my seat!!
i haven't seen AOT so i'm going off of what i heard
i'd still prefer SAO as the game genre is overall more appealing to me and just the waifus seem more
idk
haven't seen AOT so idk what the waifus are like