Sun Ce knows more about Sun Zi Bing Fa and is also very good at fighting skills.
Which General worth their salt hadn't read a military manual or 3?
I think the general consensus is that Sun Ce is more agressive. Consider how long it took for Sun Quan to take Jingzhou. The first time, when Liu Bei arrives he even cedes what he had already taken. Someone in Wei once said that Sun Quan will not move his troops when he is not sure of gaining advantage even to save his own followers.
Being more agressive does not assure success though. For example, Cao Cao could have lost all at Guan Du and Deng Ai could have been exterminated in Shu. However, being daring also means there is a chance to succeed and sometimes when you do succeed the success can be quite resounding. But when you lose, you might lose everything you have.
Also you have to consider Sun Ce's own position at the time. Wu was far from pacified as evident from all the rebellions and uprisings throughout Sun Quan's role. Could he have just left home and gone for Cao Cao? Consider that although Cao Cao suffered defeats sometimes, they were never fatal. Is Sun Ce a match for Cao Cao?
"You weaver of mats! You plaiter of straw shoes! You have been smart enough to get possession of a large region and elbow your way into the ranks of the nobles. I was just going to attack you, and now you dare to scheme against me! How I detest you!"