"Different shape" in what way?
Spinners have same 60* angle:
Spinners have same thread pattern.
Vintage spinner in Trigo wheel:
Holes for pins same diameter.
Bolt pattern the same.
Put these same Vintage wheels on an SPF last week; went right on, no issues.
Hubs same inside diameter.
Here are Vintage wheels on Trigo adapters:
The adpaters may be made differently, but the wheels have the same machining, so they are interchangeable, as are the spinners.