Your contribution is food for thought.
I, personally have never used SNS-HDR.
I think I might acquire it and give it a crack.
At the least i will be able to directly compare Merge to HDR Pro and SNS-HDR.
It's indeed best to try oneself, but attached are example crops of an impossible scene I shot, not for artistic purposes, but as a test for HDR scene tonemapping.
I first tried optimizing the resulting 32-b/ch TIFF image to my taste in LR 4.1, but I ran into impossible to avoid posterization artifacts. I then tried in SNS-HDR to simulate the overall look of the LR rendering, and the posterization was not there, and the green and magenta colors were also absent. All based on the same 7 exposure bracketed Raw files. Normally I would use Raw converted TIFFs as input for SNS-HDR, but I did a quick conversion directly from Raw to output here (a bit more similar to the LR workflow).