Review Corsair Vengeance RGB CUDIMM DDR5-8400 C40 2x24GB Review: Shiny and speedy but on the pricey side

So can you actually notice any difference between the tested ram kits when doing anything with your pc? The differences in scores seems pretty negligible.

I notice this in pretty much all ram reviews: everything scores about the same.

I’d say at this point ram is kind of a commodity: if you just have enough with a reasonable speed you won’t notice any difference buying a kit that costs 200 more (performance-wise anyway, it might have more rgb if you like that sort of thing).

Only real reason to buy the fastest ram you can get is if you’re running a cpu with a fast-ish built in gpu and no discrete gpu, like a really small pc built with laptop hardware.
 
I’d say at this point ram is kind of a commodity: if you just have enough with a reasonable speed you won’t notice any difference buying a kit that costs 200 more (performance-wise anyway, it might have more rgb if you like that sort of thing).
This has pretty much almost always been the case with DRAM. In the recent DDR4/5 generations there have basically been sweet spots of cost vs performance and anything above that sees increasing diminishing returns.

Of course whether or not there's any value in it depends on the person and workload. I bought DDR5-7200 for my system because it's pretty fast, but mostly because it was half the cost of the 8800+ at the time (things haven't gotten much better since).

If you play competitive games then the lowest latency kit with highest speed your system can run is the best choice which may justify the cost for someone looking for every last frame.