They have fundamentally different privacy technologies, and Zcash leaks significantly less data. It's the top-of-the-line tech, which is why Monero is seeking to approximate it with full-chain membership proofs soon.
This is a good video explainer on how they work:
Yeah, I get the tech part of it, but if the users don't use the privacy features, then it's not private. It would be better and I would maybe use it more if the transactions were private by default, with the option to make it transparent if you want. Just my opinion. I still feel safer with Monero, even more with bullets, but that is a whole other topic, lol.
And with FCMP being implemented, the current issues with Monero will be out the window. Hence why it is being delisted everywhere, which is a good thing. We need more actual focus on using the currency itself, and with DEXs and Atomic Swaps.
That's like saying "I don't trust Monero because if you buy it from Kraken it requires KYC".
They're all privacy tools. Use them for privacy. Zcash's privacy is better, objectively. Just stating facts here, use whatever you like.
That's not at all what I am saying, but okay. We can agree to disagree.
And sure, use what works for you. That's what I tell people, as long as they are using it, that's the whole point. For myself, I would just rather have privacy by default instead of having to make sure I opt into it.
I also like privacy by default, but that can be a wallet setting. Most major Zcash wallets are private by default.