So after using my 7600P drives for a year and even comparing them to a 970 Evo Plus newer drives that have the new controllers I'm still not impressed by the Samsungs and I'll explain why, yes for raw transfer the Samsung drives write and read a tiny bit faster on PCH, but the Intel 7600Ps on VROC crush everything out right now in almost every category for SEQ read and write speeds when it comes to more than 1 file, for 1 file yes in PCH it can transfer a bit faster but VROC drive array with the expansion card is CRUSHING all the new drives even in RAID 0 on PCH.
I made a few benchmarks here to demonstrate:

Here is the VROC Drives with just 2 Intel 7600P's keep in mind it will support 6. So you could expect these numbers to be 3X faster for the fully extended VROC. With a 9900X

Here is the PCH Drives with 2 Intel 7600Ps With a 9900X keep in mind it will only support 2, but this should be the boot drive IMHO and I'll explain why in my bottom line at the bottom of this post.

Here is the newest most expensive Samsung Evo Plus in RAID 0 PCH benchmarks with an i9-9900K

Here is the newest most expensive PNY XLR8 2TB CS3030 in RAID 0 PCH benchmarks with an i9-9900KS
Bottom Line:If you want to transfer 1 large file really fast, then PCH wise the newer drives will win... barely. But if you are comparing Read speed and gaming which means you are reading and writing a bunch of different files and different sizes or just reading a bunch of random file sizes for games which is usually how a game works anyway, the Intel drives even in PCH which only allows 2 drives, is insanely faster on everything except raw write.
However if you factor in the VROC in 6 drives in RAID 0, the Intel VROC just crushes everything mainstream available unless you are talking about PCI Express 4.0 and we are not.
As far as using VROC for a boot drive,
Don't. VROC kind of reminds me of ASUS RamDisk, from my trials, I've had entire VROC RAIDs fail and straight up disappear from my build, I would not recommend booting from VROC because it takes extra OS side drivers to initiate the drives before boot, so expect another 10 seconds added to your boot time, and I'm also having problems with the VROC as a boot drive because it's vastly inconsistent with certain file sizes so I would just reccomend using the VROC drives as a place to store your favorite games or programs but don't store anything mission critical on these because the VROC is 99% stable, but not as a boot drive.
MB: ASUS Rampage VI Apex
CPU: Intel Core i9-9900X 10 Core OCed 4.5GHZ
RAM: Corsair Dominator Platinum RGB 32GB DDR4-3600
PSU: EVGA SuperNOVA 1600 T2 80+ TITANIUM, 1600W Power Supply
GFX: Zotac 1080 Ti 11GB Mini
VROC: 2 x Intel 7600Ps 512GB
PCH: 2 x Intel 7600Ps 512GB
SSD: Samsung 850 Evo 500GB
MON: Acer Predator X34P 34" Curved Gaming Monitor 120HZ
CASE: Cooler Master Storm Trooper (Window)
LCS: Corsair H115I RGB Platinum 280MM
OS: Windows 10 Pro 64 Bit