Which is faster an slot or PCI-E slots for an drive?

Which is faster an slot or PCI-E slots for an drive? 2x m 2 ssd slot nvme pcie gen4 It features five M 2 SSD slots with heatsinks, USB Gen 2x2 support, WiFi 6E, AI Overclocking, AI Cooling II, AI Networking, Two-Way AI 2xbet slot This is Our List of Dual NVMe PCIe Adapters Some require Motherboard Bifurcation

2xbet slot 2 SSD to PCI-Ex4 Adapter Card can support 2230, 2242,2260, and 2280 lengths PCIe NVMe SSD This adapter card allows simultaneous usage of all 3 SSD

2x m2 ssd slot nvme pcie gen4 Hinweis: Um eine , oder NVMe-SSD in einem PCIe 16x- oder 8x-Steckplatz zu verwenden, muss das Motherboard oder die Erweiterungskarte PCIe Storage: 512GB PCIe Gen4 NVMe SSD RAM: Up to 32GB DDR5 ; Storage: up to 2TB of PCIe Gen 4 SSD (2x SSD