Right in that video, the Edelbrock rep says they use the Eaton TVS 1320 supercharger, which is exactly what Magnuson uses. The difference will potentially be in the rest of the supporting parts in the kit, tuning, customer support, etc. But it's essentially the same thing.

Makes me wonder if it really is an independently-designed kit using the same supercharger, or if it's just a re-branded Magnuson.