Can This Really Make a Difference?

The difference is; one has shunt-wound windings, and the other is series-wound.I dont recall which is which. The shunt-wound starter is RPM self limiting. The other will no-load spin till it blows up.lol. Ive rebuilt several of each, and on slantys and sbms I see no advantage to either.
If it fits in the hole and cranks the engine, fugetabowdit.