which is the better PCIe NVME SSD?

This one:

or this one:

I have seen in this forum the votes are for 2nd one for better speed.

Also I am having Dell XPS 8930 with Intel Optane. Also had Nividia GTX 1050. So is there any PCIe slots available? I don't know...there are 4 PCIe slots on the mother board but i don't know the ones which are remaining good for the PCIe NVME SSD?
Reply to Ashutosh_5
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More about pcie nvme ssd
  1. First of all, does your motherboard have a m.2 mount space?
    If not, you will need to buy a pcie adapter card too.

    Do not be much swayed by vendor synthetic SSD benchmarks.
    They are done with apps that push the SSD to it's maximum using queue lengths of 30 or so.
    Most desktop users will do one or two things at a time, so they will see queue lengths of one or two.
    What really counts is the response times, particularly for small random I/O. That is what the os does mostly.
    For that, the response times of current SSD's are remarkably similar. And quick.

    If you are on a budget, buy a conventional 2.5" sata based ssd.
    You will hardly tell the difference.

    Lastly, buy a Samsung 850 evo. they are more reliable and faster.
    No name brands are asking for trouble.
    Reply to geofelt
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