The Code Black and NRP are close. I've seen a ton of people drill both and use both. I plan to do the same in the near future. The Code Black seems to transition a little bit harder and the NRP has more of a footprint. People that usually have a "pin down" Code Black tend to go "pin up" on the No Rules Pearl to ball up when moving left. People that go down on the NRP use it on the fresh (with surface like 1-3k depending on speca and condition) and go to the Code Black pin up on transition. While they are close, there is enough of a difference to have both especially with different surfaces and layouts.
