@stevedoc
After a conversation with wiggle the other day about these forks, they sent me some photos and a serial number for one if them. They were really helpful actually.
The 38 K appear to be 2022/2023 so have the deeper crown to reduce the risk of creaking. Crown width is 58 rather than the 68mm. However, Fox say that the choice between 58 and 68 is purely cosmetic and does not affect strength. It’s just because some ebikes have big chunky head tubes.
The only difference on the ebike versions, not that this is, is a softer tune as ebike riders spend more time sat down. Or so I read.