Both are $4 each (2.02 oz.) and available on the e.l.f. website now (click a link to view the listing):
Magic Matte Mist and Set
Illuminating Mist and Set
I can't help but think that e.l.f. is referring to the Urban Decay setting sprays in their fine print at the bottom of the above image. What other popular department store setting sprays are exactly $30 and come in multiple formulas? Urban Decay definitely is the first brand that comes to mind.
Just for the record, the UD setting sprays are $30 for 4.0 oz, whereas the e.l.f. setting sprays are $4 for 2.02 oz. So it's not like you're getting the exact amount of product for $26 less per bottle. But it actually works out to $1.98 per ounce for the e.l.f. setting spray, and $7.50 per ounce for the UD setting spray. So that's still a very nice cost-savings if you like the e.l.f. product.
Are you a fan of the original e.l.f. Studio Makeup Mist & Set? If so, do you think you'll give one (or both) of these new setting sprays a shot?