Interesting...Android Authority specifically calls out the Note 5 as a solid alternative to the V10 with a somewhat "tubey" sound due to some Second Order IM distortion.
http://www.androidauthority.com/best-of-android-2015-audio-660588/
"The Galaxy Note 5 stood out the most in terms of a unique tone, as the tracks seem a little warmer here than on other phones. After listening, I took a closer look at the intermodulation distortion results and found an interesting introduction of some second harmonic distortion that can’t be seen on other phones (at least not this noticeably). Although it only appears very slight, cumulatively this might be audible when listening to a full track. The panning and high-end detail are excellent with vocals cutting through nicely, but the extra smoothness might not sit well with everyone."
"There appears to be some additional 2nd harmonic content introduced somewhere in the Galaxy Note 5’s signal path, which is more typical of a classic warm valve sound."
Given that, and how tastes vary, some folks would prefer the Note 5 to the V10 and vice-versa.