"(since TRC doesn't like to bash other products directly) and based on my own side by side testing of ONR and N914...there are two main aspects of N914 where it comes up short.
1) N914 doesn't "soften" hard water as compared to ONR, Absolute or most other rinseless washes. "Softening" in this case refers to the ability of a rinseless product to prevent hard water minerals from going into the paint and causing hard water spots. I have very hard water and have experienced this first hand. If N914 is allowed to dry on the surface (especially in the sun) and not fully wiped away, it can leave hard water spots. While that can certainly be adjusted for in your wash process (just treat it like a soap and don't let it dry, or only use distilled/DI water)...it isn't ideal. It also makes it so that you need to be much more vigilant for any drips from mirrors or behind trim.
2) N914 holds dirt in solution and doesn't push it to the bottom of the bucket. I've tested this many times, on different vehicles with different types and levels of dirt. Split it down the middle and wash one side with ONR, the other with N914. Use the exact same process on both sides...apply presoak with a pressure sprayer, use the same wash media, and dry with the same towel (and drying aid if desired). The N914 bucket always looks substantially dirtier, both during the wash process and after 24+ hours of letting the bucket sit undisturbed. Some have argued that this means that N914 is removing more dirt from the surface and releasing it from the wash media better. In my experience, I have found that ONR actively pushes dirt to the bottom of the bucket, below the grit guard. Even after 24 hours, the N914 bucket looks much dirtier because it is holding dirt in suspension while the ONR looks practically unused. Same vehicle, same type and amount of dirt. I've even gone to the point of pumping out the buckets with a transfer pump in order to not disturb the dirt at the bottom of the bucket. The ONR side consistently has more dirt (fine sand, silt and clay) at the bottom of the bucket, while the N914 bucket only has mostly larger grains of sand because all of the finer material went out with the solution. Again, not a deal breaker but it requires a process adjustment where you need to treat N914 more like a soap by doing either a two bucket method or multiple towel method so that your wash solution stays cleaner.
I've worked in the civil engineering and construction field for 17 years, and i deal a lot with soil testing and gradations. I'm tempted to do a controlled test with the same type and amount of "dirt" dumped into buckets of N914 and ONR/Absolute (and distilled water for control). Pump out the buckets and filter the liquid to the smallest sieve size, and then clean out the bottoms of the buckets and keep them in a separate sample to be dried and tested to determine how much material was held in solution of each liquid.
At the end of the day...if you like N914 and it works for you, that is great and you should keep using it. But don't presume that everyone else should agree with you and expect that TRC should sell your preferred product."