whats the difference in performance in bore through woods because i know that titleist has some and callaway has almost all of thier woods more through wats the difference???

Rice,

It will vary from head design to head design. The Titleists have deeper bores and tend to make shafts play stiffer than the stated flex. Callaways are not as deep and thus shafts will play more true to flex. 'Hope this helps.

Jeff