Riders might prefer the Yamaha MT-15 V1 over the KTM Duke 125 due to its more powerful engine (18.1 bhp vs 14.3 bhp) and better fuel efficiency (around 56.87 kmpl vs 46.92 kmpl). The MT-15 also offers a more refined riding experience and better visual appeal, which could sway buyers away from the Duke 125 if priced similarly.