USB4 or 240Hz monitors are more likely to have a modern HDMI/DP chipset, relative to 60Hz monitors. It’s not a certain relationship but it can be a useful filter for dreck to narrow one’s choices to monitors that support either USB4, or 4K at 75+ fps, since that wipes out a lot of old HDMI 2.0 chipsets — which is a useful, if imperfect, proxy for Thunderbolt chipset quality. A monitor that’s just trying to hit $100 will cheerfully target old HDMI and old DisplayPort with random-old-DSC. For Apple gear, random crap like that will typically end up being a disaster for Apple laptops, anyways, because Apple takes for granted that all of those stacks are in sync and before USB4 they rarely were.