Earlier quoted context omitted.
I prefer Zcash's privacy perspective, but one thing I've noticed about using both is the zcash cli wallet is pretty terrible (especially if you're using shielded addresses) and the monero cli wallet is among the most user friendly cli apps that I've ever used. Little touches like that keep making me reconsider the project in a favorable light.
Zcash's privacy perspective seems to be highly flawed because of the way it was implemented though (optional opt-in privacy): https://news.bitcoin.com/not-so-private-99-of-zcash-and-dash... and https://electriccoin.co/blog/new-research-on-shielded-ecosys...
If the whole network private, then the privacy faults can only happen at its boundaries--which are places that the protocol designers have less control over. The alternative is having to wonder about what kind of identifying metadata the exchanges are leaking--and they're an easier target for an adversary.
Also, I have to imagine that the everywhere-private nature of XMR is why I don't see it on my exchange's list, while I do see ZEC there.
But I wasn't talking about that. With zero-knowledge proofs protecting the shielded transactions, your anonymity pool is essentially the entire set of people that use shielded transactions. With the Monero approach, your anonymity pool is large, but it's still a subset of the whole network.