So how come, that Samsung SM951 is much much cheaper, yet just as fast, or even faster in every metric? The only thing that is slower, is the read speed(2150MB/s vs 2200MB/s). Better write speed, more IOPS, and cheaper.....so how is the 950 Pro a flagship?
SM951:
http://www.scan.co.uk/products/256gb-samsung-sm951-m2-(22x80...
950 Pro:
http://www.scan.co.uk/products/256gb-samsung-950-pro-m2-(22x...
The 512GB 950 Pro is $349, 512GB SM951 is as much as $490 if you can manage to find it. The 256GB SM951 is more available, but it's the same price as the 950 Pro at the very best.
And that's before you start to see sales on the 950 Pro, which you will definitely see.
SM951 is an OEM product and you're generally hard pressed to find it available as a consumer in any substantial quantity. The 950 Pro is a mass market consumer product.
Just look at Amazon, Newegg, etc.
In other words, if your workload isn't super heavy, this is quite fast - but then, why the heck are you buying this expensive, low capacity power hog if your workload is almost certainly fast enough on a slower drive?
At the very least, this drive should be beating or equaling samsung's own SATA drives reliably - but it's not. The power consumption is also worrying, especially due to the tiny form factor...