Around here "Boston cream" usually has a sort of yellowish tint to it. The "Manager's Special" filling is more white, but it's definitely not whipped cream or the cream they usually put in "cream-filled doughnuts. By itself the "Manager's Special" filling is not particularly appetizing looking, but it has a pronounced vanilla flavor.
we might possibly call it "New-Variant Boston Cream with Jimmies"
I personally can't stand those tiny little candy spheres that make up non-pareils. They're not exactly edible, and they make my teeth hurt, they're so sweet.