Both script are masterpiece. Not just the story but the way it's told.
W use flashback into hypotethical flashback and dispatch that during episode 9 for example. So we follow the action but always a step back to the truth. Highly entertaining because we always want to know what happens and we get that at the exact point when this is the best time to know.
MOTA use a lot flashback too, during episode 13 (or 14 I don't remember). Deconstruted pace, following login in/login out of the game.
Both dramas have ultimate scene using Fantastic process to induce emotions + Double meaning cause and effect. Police station scene in W, hospital parking lot scene in MOTA. You can't get that in others dramas.
Overall, I prefer W. More fast paced, more crazy plot-twists and hidden logic behind. Even if the drama is not easy to understand during the last part, it's still more easy than last episode of MOTA, and also more consistent. You can make sens about most of what happened in the drama.
W high concept is also more striking. Totaly absurd, but taking seriously the premice. Like stories of the Twilight Zone serie.