Arjuna’s motive was to please Krishna, to follow Krishna’s orders and Duryodhana’s motive was his own sense gratification. He wanted to win the war for his own prestige, power and sense gratification, for his own material motive. So the difference of course was that Arjuna achieved life, he achieved victory and also eternal life and Duryodhana, he died along with his entire family members.
HH Jayapataka Swami Maharaja
16th December 1983