The Primer dupe that shook me!

Smashbox photo Finish Primer Water ( 116ml for £22, 30ml for £12) vs Primark PS…Primer Water (150ml for £2)wait let me digest this, a bottle thats 5 times the size of its smallest size and is 1/11th the price of it’s biggest size? Shade range: It’s a transparent water based spray so it’s a universal shade.