X

My intuition says funnel beats anti-funnel, but I'm not pretending to know the physics

You would think the first one because more of the mass is up too but I'd be lying if I said I was entirely sure that's the case here.

I’ll say x because the top of x allows more air to more quickly replace the water being drained. But I really have no idea.

Both empty at the same time

Same time. Shape of container means fuck all. Same site spigot open same amount means flow rate is the same. I would like to thank my fluid mechanics classes.

X because there will be a higher pressure at the outlet for a higher percentage of the volume

same speed