As Shadetree implied it is the process that determines the outcome of a recipe not the source of the recipe. I can guarantee that if you and I both bought the same kit from NB and we each brewed that beer “according the the instructions” on our own systems, we would have recognizably different beers. I’m not suggesting whose would be better, just that they would be different even though “on paper” they are supposed to be the same!
For example, I have a Cal Common All Grain recipe that I love. The first time I made it, I got several medals in various large competitions because that beer was awesome. Unfortunately, I have tried to brew it 2 more times since then and the results have not been as nearly as good. I don’t mean the re-brews were infected or off flavor in any way just that all 3 versions are significantly different beers when tasted side by side. How come? Because I realize I do not have the necessary consistency in my process to duplicate a beer every time. I’m working on that consistency and I will consider myself an excellent brewer if I ever get there.
Bottom line, the brewer makes the beer not the recipe.