The larger display offers up to 30 percent more active screen area than Apple Watch Series 4, Series 5, and Series 6, and up to 9 percent more than Apple Watch Series 7, Series 8, and Series 9.
For the Series 4-6, case sizes were 40mm and 44mm ... For example, if you have a watch band that fits the 44mm Apple Watch Series 6, it should also fit the 46mm Apple Watch Series 10.