If you look at the Figure 3 below in Oticon’s 2013 paper on Spatial Sound management, ONLY the noise is attenuated on the ear with the poorer signal-to-noise ratio, not the speech signal. So even if this happens to be on your better ear, it’s still helpful to enable Spatial Noise Management to improve the signal to noise ratio of the speech on your better ear. I really can’t think of a situation where you would want to turn Spatial Noise Management off, but if they give people the option to turn it off, maybe there’s a reason. The only reason I can see is that it would cause an imbalance in the noise suppression which people may not like if they want to be able to hear the noise for some reason. Noise to somebody may be valuable audio information for others, I guess. The second screenshot below mentions how the extent of the spatial noise management is influenced by your personal profile selections. I guess the option simply gives the user a way to just turn it off altogether if they want.

As for the Spatial Balancer feature you mentioned, I don’t really see such feature named called out. But the whitepaper mentioned Spatial Sound Premium and Spatial Sound Advanced, and the screenshot below says that the Binaural Processing is part of these 2 features. I assume that your Spatial Balancer is basically the Binaural Processing. If they don’t give you an option to turn it off, then I guess it’s always enabled, and is not affected if you turn off Spatial Noise Management.