Header's soccer ball deals less shield damage (-2.5).
The interaction of Header's soccer ball with stage collision was fixed, removing several setups and making Header use from ledge less consistent. However, this in turn created a new tech known as Header Getup.
The soccer ball has a higher vertical air speed during Header's startup (1.5 → 1.6) ultimately leading to Header yielding more shallow angles.
Removed Header's landing lag, leaving only the universal landing lag (9 frames → 4).
As a result, Header is no longer temporarily disabled after using Header in the air, charging Sun Salutation or using Deep Breathing while still airborne, and canceling the move as Wii Fit Trainer lands.
Grounded Header has more landing lag (4 frames → 9), matching its lag prior to Update 11.0.0.