If I am honest, not many here are interested into Zcash so I do not see it even competing with XMR. Bear in mind, in order to succeed a coin needs network effect which is created by the community willing to buy and hodl - tech is not sufficient enough (we saw this from btc's first generation shitcoin alternatives).

So far Monero has a community that is willing to buy and hodl, and if the community keeps buying and holding, more people will join into the party and that will accelerate the network effect and price surge to the Moon^TM.