Benchmarks make 3500 look way better than 2400. But honestly with normal day to day tasks you likely won't notice anything.
I have a pci gen 4 board and a wd sn850 2tb drive. When it started to fill, rather than buying another 2tb sn850 for around $380 (at the time), I bought a 2TB sata ssd for around $160 (less than 1/2 the price). Yeah, benchmarks showed my WD Sn850 hitting around 7000MB/s, and my sata only hitting 530MB/sec or so. That's 14x slower. But I put some of my games onto the SATA and the difference is negligible. Load times for call of duty were like 12 seconds on the sata versus 11.2 seconds on the sn850 nvme.
So, I tend to keep my games on the cheaper ssd, and save the faster storage for my vms, where I did myself copying .vhdx files to and fro and benefiting from the performance uplift.