Einige 512 GB Apple SSDs sind mit 2 Lanes an den PCI Bus angebunden, die TB Version dann mit 4. das macht schon einiges aus.
Ob man das merkt sei dahingestellt, aber zählbar ist das deutlich mehr.
Apple SSDs: Proprietary Apple 12+16 pin to PCIe adapter needed for Mac Pro 5,1 & older and also 7,1. No adapter needed for Mac Pro 6,1.
SSUAX & SRIUP: Based on Samsung XP941 with UAX controller (S4LN053X01) and Toshiba with Marvell 88SS9183 controller: AHCI
2D MLC
Available in 128GB, 256GB, 512GB, and 1TB
PCIe 2.0 x2 (128GB, 256GB, 512GB) & PCIe 2.0 x4 (1TB)
Speeds: ~1,000 MB/s read, ~800 MB/s write
Sector size: 4 KBytes per sector
Compatibility status: Good
SSUBX: Based on Samsung SM951 with UBX controller (S4LN058A01): AHCI
2D MLC
Available in 128GB, 256GB, 512GB, and 1TB
PCIe 3.0 x4
Speeds: ~1,500 MB/s read, ~1,425 MB/s write
Sector size: 4 KBytes per sector
Compatibility status: Good
SSPOLARIS: Based on Samsung SM961 or PM961 with Polaris controller (S4LP077X01): NVMe
2D & 3D MLC or TLC
Available in 24GB, 32GB, 128GB, 256GB, 512GB, 1TB, and 2TB
PCIe 3.0 x4
Speeds: ~2,700 MB/s read, ~2,350 MB/s write
Sector size: 4 KBytes per sector
Compatibility status: Good