yuvam tulya-balau virau
he rajan he vrkodara
ekam pranadhikam manye
[Lord Balarama said:] King Duryodhana! And Bhima! Listen! You two warriors are equal in fighting prowess. I know that one of you has greater physical power, while the other is better trained in technique.
Bhima was physically more powerful, but Duryodhana was more advanced in terms of technique.