Pls help.. confused for isca..

Hiii.. I m referring for ISCA Manish Valecha.. But sumtyms wen i refer Study Mat i find change in language & answers are presented in different words wid same meaning.. No doubt d language used is of Technical ISCA language.. What to do i m confused in reffering both.. I cant handle Study Mat as its to tym consuming to graps while Manish Valecha is easy to graps.. I want to fetch 60+.. Is it jst enuf to go wid Manish V..?