Wow, it's pretty clear you haven't actually watched much of Moura. I have no idea where you're getting some of this from. I haven't seen anything of Zaha bar the youtube videos, but I've seen quite a lot of Moura. He is FAR from a sure thing! He's certainly talented, but he has a very, very long way to go before he comes even close to justifying that price tag. Firstly, he wasn't "very good" at the Olympics. He was decent, but didn't even start.
Moura is NOT a technical player, where in the name of absolute feck have you got this from? For every piece of skill that comes off, he loses it ten times. Of course this is expected from a young player, but his technique is far from standout for a player of his type. His touch is erratic, and I'm being extremely generous here. His vision is nothing special, it's probably about where it should be for a winger of his age. For example, if you contrast Lucas with Neymar, there is simply no comparison in terms of technique, touch, vision, creativity, flair etc.. Now, what Lucas does have is an abundance of pace and acceleration which instantly makes him a threat, as well as good strength and very good balance. His dribbling is decent but more often than not he just kicks it ahead of himself and sprints past his opponent. Not necessarily a bad thing but he has a lot of work to do. I'm not saying Lucas is a bad prospect, but to me it's clear you've bought into the hype without actually watching him much. He's really not what he's purported to be which your post is proof of. I really don't know how you've come to the conclusion that he's some sort of technical genius, but it's far from the truth. I've watched him a lot. Hard for me to say since I haven't seen Zaha, but I'd imagine they're much closer talent wise than you'd like to think. And I wouldn't even be that confident that Moura will turn out to be the better player.