OP: Even if it's not an Oregon tort, it looks absolutely beautiful to me. I think we spend too much time in this hobby worrying about pedigree. Not saying that the 'pedigree' corals are often spectacular, but I've seen nonames that are very bit as beautiful. I would be proud to have that coral in my tank. Also, identifying a coral species is nearly impossible until they grow out and, it is my understanding that in many instances, a confirmed identification requires placing the skeleton under a microscope.
Your tank looks pretty amazing to me and again, you should be proud. I'd also suggest that 'low nutrient' is in the eye of the beholder. We've all seen VLN tanks that are amazing. On the other hand, there are those that swear by the need for measurable phosphates (and even some that insist you need some nitrates) to have a successful tank. If what you are doing is working (and it certainly appears that it is), keep it up.