I've never tried either one. Lately I've been doing mostly tractor restorations (they tend to take a lot of product). I'm just about out of Universal, so I'm thinking of options. Will I notice any differences? Will switching be worth the savings? I suppose I could (and maybe should) be using single stage on a lot of the cast iron parts. I haven't priced it. The last quart of Motobase I got was $115 (Ford Tractor Blue).