neowin[.]net/reviews/windows-11-24h2-vs-23h2-in-place-upgrade-performance-in-2025-some-super-surprising-results/
Neowin's reviewers kept Win11 at default settings, which meant VBS enabled, along with I would *guess* BitLocker, and that could effect the results, though I've no idea which version of Win11 would come out on top if those were turned off.
Their benchmarks show Win11 23H2 is clearly the winner except for one result:
We start with the most interesting outcome as we are greeted with enormous performance improvement in Black Myth: Wukong on Windows 11 24H2 when Frame Generation (FG) option was enabled.
They also got one result that *may* worry some folks -- Win11 24H2 used much more RAM. Note however that I have not seen this on our laptop that does not meet Win11 requirements with an i3 & 16GB RAM with VBS & BitLocker off.
Again, interesting results here as we find Windows 11 version 24H2 consistently allocates much more memory in apps and games than 23H2. The only exception was in 7-Zip.
So should you upgrade?given that Microsoft has now started pushing the feature update out to more users.The answer depends on the situation. 24H2, for example, showed a clear victory in the case of frame generation, though, in single-threaded instances, Windows 11 24H2 started to fall behind. And also, if snappiness is your priority, then you may find 23H2 better since the app start-up performance on 24H2 was significantly behind.
RAM allocation is also something to keep in mind since 24H2 may warrant a minimum of 32 GB.