^{Originally posted by KapiWilq November 17, 2024}
A year ago, there was introduced a change in the way that the Unstable Rate is calculated. It made the Unstable Rate account for the gameplay rate, which made the Unstable Rate not require conversion when playing with rate-changing mods. There was raised a fair concern about osu!mania, but according to these replies the Unstable Rate value for osu!mania should be correct. It's not correct.

Why?

osu!mania scales hit windows to account for the rate change¹². This makes the Unstable Rate not require conversion when playing with rate-changing mods since hit windows are being resized to make them "effectively" the same size as if you are playing without rate-changing mods. Therefore, by converting the Unstable Rate in osu!mania, it's value is incorrect. This also makes the Unstable Rate value shown in osu!(stable) correct.

osu!(stable)	osu!(lazer)

This is the score that I used for the comparison in these screenshots: https://osu.ppy.sh/scores/mania/301846710