1. NH-D14 - flagship model
2. NH-C12P/NH-C14 - lower profile solutions
3. NH-U12P SE2 - former flagship model predecessor of D14
Yes they are better then a 212+ but you'll pay for it.
The Noctua's have very good fans(quiet) and very good cooling performance.
Price and performance wise the 212+ represents better bang for the buck though.