I currently own all of these coins and am wondering what people think of each of them and why is one better then the other?
Monero is by far the most
undervalued coin in the market best out of those coins you mentioned, followed by Zcash. Both coins offer the best privacy features. I prefer Monero because it is private by default meaning that every transactions is made private automatically, and because it has an active dev team that is always trying to make improvements on the project.
Verge is just another cryptocurrency that's trying to pass a privacy coin when it facts it offers absolutely no privacy/anonimity compared to the coins above. The only reason it is being mentioned in cryptocurrencies forums is because the marketing team behind does a great work at creating hype out of thing air.
Copy-paste project, Dev teams always missing deadlines, shitcoin being promoted as privacy coin when it offers pretty much the same privacy as bitcoin...overall, stay away from it.
Pivx, I've never heard of this coin until it was added on Binance a few days ago, so I can't for sure if it is a good/bad privacy coin.
DeepOnion is a meme coin, c'mon now...