Q. Is this bike better than the KTM 390 Duke - YZF R3?

Talking about power, mileage, comfort then no.. but R3 is a good bike and grapes attention even the Duke 390 and RC 390 does the same in my opinion I will choose to go with RC 390 because it's having great look great power and a bit safe from Duke 390 but you can have severe back pain on RC 390 for long rides

Dear Sunayana I don't want to hurt you but Yamaha R3 is far better than Duke 390. Duke 390 have some advantages/merits a).price, b).top acceleration, c).mileage, d).spare parts low cost.

R3