About 230 staff moved together for this concert. The difference in determination that T-ara members talked about is not talking about the ability to stand on or off the stage.
If one of them sloppy, or careless, or only thinks about herself, the concert will have no choice but to rust. That concert would look fancy only on the outside, but would only become a concert for publicity. The members mentioned determination meaning that all stars and staff much work with determination.
The most important thing for the staff and the singers is health.
This is because the body must be healthy and in good condition to look good on stage.
Eunjung slipped on icy roads and had her ligaments torn, and Jiyeon also hurt her leg during a drama filming and had to get a cast. Also, Jiyeon crashed into the top of a light during the Osaka Concert during the Japan Tour, and her nose was cracked. The hospital requested an emergency surgery and the company representatives and concert staff was very against her standing on stage, but Jiyeon did not bend her will on wanting to stand on stage. She finished the concert, returned to Korea, obtained surgery and was hospitalized for 3 days after.
The reason why Hwayoung did not go on stage this concert after she hurt her leg was for the sake of protecting the star. She wanted to go on stage, but all staff and T-ara members dissuaded her, and Hwayoung attended only the DAY BY DAY stage according to her wishes.
Therefore, the difference in determination that T-ara talked about was not talking about being able to stand on the concert stage or not.