Crystal Mark Scores - SSD SATA vs M.2

Why is the NVMe slower than the SSD running storage catching? It gets close but not as quick as the regular SSD even when I switch caching to the M.2
Ps both SSDs haver over provisioning to speed them up.


1.
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CrystalDiskMark 5.2.2 x64 (UWP) (C) 2007-2017 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

Sequential Read (Q= 32,T= 1) : 2053.331 MB/s
Sequential Write (Q= 32,T= 1) : 2132.583 MB/s
Random Read 4KiB (Q= 32,T= 1) : 261.121 MB/s [ 63750.2 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 242.630 MB/s [ 59235.8 IOPS]
Sequential Read (T= 1) : 2690.646 MB/s
Sequential Write (T= 1) : 2436.619 MB/s
Random Read 4KiB (Q= 1,T= 1) : 263.285 MB/s [ 64278.6 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 244.470 MB/s [ 59685.1 IOPS]

Test : 1024 MiB [D: 70.5% (79.9/113.3 GiB)] (x1) [Interval=5 sec]
Date : 2017/09/19 20:04:44
OS : Windows 10 [10.0 Build 15063] (x64)


2.
-----------------------------------------------------------------------
CrystalDiskMark 5.2.2 x64 (UWP) (C) 2007-2017 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

Sequential Read (Q= 32,T= 1) : 773.293 MB/s
Sequential Write (Q= 32,T= 1) : 321.577 MB/s
Random Read 4KiB (Q= 32,T= 1) : 144.224 MB/s [ 35210.9 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 210.268 MB/s [ 51335.0 IOPS]
Sequential Read (T= 1) : 689.413 MB/s
Sequential Write (T= 1) : 76.333 MB/s
Random Read 4KiB (Q= 1,T= 1) : 34.090 MB/s [ 8322.8 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 112.896 MB/s [ 27562.5 IOPS]

Test : 1024 MiB [C: 37.5% (44.3/117.9 GiB)] (x1) [Interval=5 sec]
Date : 2017/09/19 20:07:06
OS : Windows 10 [10.0 Build 15063] (x64)




3.
-----------------------------------------------------------------------
CrystalDiskMark 5.2.2 x64 (UWP) (C) 2007-2017 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

Sequential Read (Q= 32,T= 1) : 399.358 MB/s
Sequential Write (Q= 32,T= 1) : 154.378 MB/s
Random Read 4KiB (Q= 32,T= 1) : 201.215 MB/s [ 49124.8 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 154.191 MB/s [ 37644.3 IOPS]
Sequential Read (T= 1) : 426.136 MB/s
Sequential Write (T= 1) : 156.862 MB/s
Random Read 4KiB (Q= 1,T= 1) : 33.497 MB/s [ 8178.0 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 80.825 MB/s [ 19732.7 IOPS]

Test : 1024 MiB [S: 0.2% (0.1/58.8 GiB)] (x1) [Interval=5 sec]
Date : 2017/09/19 20:02:21
OS : Windows 10 [10.0 Build 15063] (x64)



4

-----------------------------------------------------------------------
CrystalDiskMark 5.2.2 x64 (UWP) (C) 2007-2017 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

Sequential Read (Q= 32,T= 1) : 2039.648 MB/s
Sequential Write (Q= 32,T= 1) : 2167.297 MB/s
Random Read 4KiB (Q= 32,T= 1) : 252.339 MB/s [ 61606.2 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 236.154 MB/s [ 57654.8 IOPS]
Sequential Read (T= 1) : 2678.454 MB/s
Sequential Write (T= 1) : 2375.103 MB/s
Random Read 4KiB (Q= 1,T= 1) : 251.618 MB/s [ 61430.2 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 238.167 MB/s [ 58146.2 IOPS]

Test : 1024 MiB [C: 37.6% (44.4/117.9 GiB)] (x1) [Interval=5 sec]
Date : 2017/09/19 20:14:40
OS : Windows 10 [10.0 Build 15063] (x64)