Generally they made things the same, this simplified things at the factory, think cheaper.
This way they could put mags on and sell it for more or put spokes on to keep the price down.
Now to be a bit more specific a 400s mag should fit right on your 400h. Being they are both drum brakes makes it easy. Adding a disc brake wheel to a drum brake bike is a bit more involved. Or doing the opposite, disc to drum.
If you want you can go to an online parts seller like boats,net and look through the listings to compare part numbers.
Leo