The sure look similar. The shaft diameters are definately the same.
I can't say how the number of claws and winding details are best matched with a stator, but there is science to it.
I can warn you not to use aftermarket pulleys without very carefully checking all dimensions.
At least some (many?) of the yellow chromate ones have too tight of an inner diameter and also do not always line up correctly with the other engine pulleys.
The OD is also too fat for most pullers.
Also try to find/save the shaft grease shield on the diode side. I notice a lot of the rebuilds leave them out. Then the slip rings get contaminated more quickly than they should. There doesn't sem to be a retail source for new ones. Originally they came in a repair package with the slip rings.