Why are chairs of India's Gukesh and China's Ding different at World Chess Championship?

India's 18-year-old Grandmaster Gukesh D and reigning world champion Ding Liren of China were offered to pick their chairs for World Chess Championship. The duo were reportedly asked by the organisers to choose from seven chairs. Ding chose a simple office chair, while Gukesh chose a high-back gaming chair. "Gukesh's chair looking dominant already," Dutch grandmaster Anish Giri posted.