SB 10.79.26
yuvam tulya-balau virau
he rajan he vrkodara
ekam pranadhikam manye
utaikam siksayadhikam
Translation:
[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.
Purport:
Bhima was physically more powerful, but Duryodhana was more advanced in terms of technique.