I looked on Whitney Farms web site and did not see a 10 percent N organic fertilizer, nor one with a 5-1-3 nutrient ratio. Organic fertilizers would be acceptable with in ground trees, because of the high content of organisms in the soil that break down organic fertilizers making them available to plants, but not for container grown trees. This is because the medium in containers does not contain the required organisms that can break down organic fertilizers, thus they do not become available to the plant.
I saw no difference but thats just been my observation outdoors in the summer...I think outdoors there are plenty of microorganisms in containers. Humic acid and EM-1 would also help facilitate nutrient availability with either organic or non organic nutrients.
**The Whitney Farms product also is extremely low in heavy metals which is a positive. However, aside from calcium and sulfer there are no other micro or trace elements.