The 128GB Surface Pro 4 models use perhaps the worst NVMe based SSD in production (link is closest model on Samsung's site, but specs line up with benchmarks) : r/Surface
Samsung PM991a 128GB NVMe PCIE SSD Hard Hard Drive 7NRJ4
Amazon.com: OEM Samsung 128GB M.2 PCIe NVME SSD Internal Solid State Drive SSD 42mm (2242) MZALQ128HBHQ M Key : Electronics
Samsung Pm961 128gb Top Sellers, 50% OFF | ilikepinga.com
Samsung Ssd M.2 2280 Pm991 128gb 256gb 512gb Nvme M.2 Pcie3.0 For Laptop Desktop 1tb Internal Solid State Drives - Solid State Drives - AliExpress
Samsung XS1715 SSD Review (1.6TB) - An NVMe SFF-8639 Monster at 3GB/s | The SSD Review