Oh wow I had dates flipped in my head... That is a good question. My guess is price difference (about half) and branding with a familiar retail name? Compared to the rest of the retail family the SM951 would stick out like a skylight next to a couple AA cell flashlights in terms of performance, and would not have mixed well with the rest of the product line...m.2 was only released 31st March 2015 so you are incorrect there. SM951 was available from approximately July 2014. Also SM951 only released as OEM part is odd. There's no reason they couldn't release it as a retail part.
Hence my question...
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