The main reason for the Hoosierdaddies' superior performance was the singing by Jessica Sanchez performing as lead singer Frida Romero. She was especially strong singing Zedd's Clarity. The choreography also added a lot to the group's entertainment value. The steps performed by actor/dancer Jared Murillo were particularly good, albeit brief.
I did some research to find the actors/performers in the Hoosierdaddies. See the answers at the link below.
Glee Hoosierdaddies' dancers