What are the Differences between Gen4 and Gen3 PCIe SSDs?

PCI Express can i use m 2 pcie 4 0 in 3 0 slot 2 Slot is from the Ryzen 7 5700G then it will only support PCIe Found this tech site that explains that a Motherboard can have both PCIe and slots: cannon cove slot PCIe x4 slot with Lower impedance CONNECTIVITY Dual NVMe PCIe * Connectors

candyfinity slot This would be like similar data rate to if a x32 PCIE slot existed, which we can safely say is overkill for gaming scenarios YMMV (eg maybe