If Sasori and Deidara was to fight, Sasori would have won. Deidara probably doesn't even know HOW to break Hiroku(sp?) to get Sasori out. He probably didn't even know that he needed to get Sasori out. Even if he did know, he wouldn't have been able to beat Sasori's 3rd Kazekage puppet, much less his collection. Maybe he CAN beat him if he commited suicide, but I have high doubts that he would have done that anyways.[/QUOTE]
I´m sure Deidara knows how he could break Hiruko beacause Deidara and Sasori were partners in Akatsuki, wich means they should know eachothers strenths and weaknesses to work as a team properly. Likewise Sasori should know about Didaras skills.