Same Song, Same Developer, Different Games, Different Charting

Left - Arcaea Right - In Falsus In Arcaea, both hands can operate the keys, making it easy to add trills. However, In Falsus, since the keys are handled with one hand, instead of adding trills, you can see that the lower notes follow the vocals while the "field" (the things that appear in the air) are used to add extra difficulty. They look similar but are completely different games. The charting styles also differ accordingly.