Note, however, that any altcoin is subject to the spin-off technique, which is likely to start happening very soon so make your money in alt-ledgers while you can
Pretty much this. CryptoNote is clearly the future and the only legitimate way to do 100% anon transactions. Dark Wallet doesn't fully solve several issues, Darkcoin is subjected to node attacks, and the other CN coins haven't got the good combo of solid + solid launch without shaddy stuff. It's pretty much guaranteed it will reach Darkcoin prices this year. GUI wallet is already available.
I found that not only monero implements cryptonight. What is the difference between Monero and Bytecoin?
They have the same level of anonymity.
Boolberry is has better anonymity than both. This presentation explains why -> http://www.slideshare.net/boolberry/boolberry-solves-cryptonoteflaws-37055246