What is the Difference Between PCIe Gen 3 & Gen 4?

So i have a Asus x570 prime pro and today i was going to replace my gen 3 ssd with 2x gen 4 ones On setting the top M2 slot to forced gen 3

What is the Difference Between PCIe Gen 3 & Gen 4? Gen 3 1TB NVMe SSD for around $150-200 depending on the model This puts the price premium at about 30% between Gen 3 and Gen 4 slot runs at

So i have a Asus x570 prime pro and today i was going to replace my gen 3 ssd with 2x gen 4 ones On setting the top M2 slot to forced gen 3

slot screw head PCIe Gen 4 offers a massive upgrade over the traditional PCIe Gen 3 SSD The new standard almost doubled the transfer speeds as compared to

Gen 4 SSDs aren't worth it unless you're working with large files and doing a lot of sequential readwrites

gen4 ssd in gen 3 slot PCIe Gen4 is the fourth generation of the PCI Express specification As the subsequent iteration of Gen3, Gen4's data transfer rate is twice that of PCIe Gen 3,

But I'm wondering if there are other benefits to gen 4 SSDs in a gen 3 slot such as heat, idle or loaded power usage etc The price difference