Keep or change fabric?

I chose the dress I am wearing on the right. It’s made of a Dutchess satin which looks yellow and grayish. Next to me is a mikado fabric dress that shines brilliant white. I am not sure if I should change the fabric because 1. It might not fall and pleat the same 2.if it’s worth the cost. Would you change it to mikado or leave it as is? I just want to look my best on my wedding day and it’s stressing me out :/