USPS Express would not only be more expensive, but slower. Thursday is a mail holiday for all carriers, so all shipments are going to be delayed because of that. Even If I select saturday delivery with UPS, no packages would be delivered till Monday.
Using their flat rate boxes it would, but looking at both sites from MO to WI with a 1 pound package UPS 2nd Day is $25 and delivered Tuesday. USPS Express using non-flat rate paying at the place is $28 or online label printing is $20 and I would receive Monday. These are both shipping out Friday.