how much tougher to get clear icwai final than inter....

i did mba (finance) in 2008 and i have cleared icwai (inter) in first attempt in june 2010.........i just want to know about how final is tougher than inter......and for what subjet do we have to concentrate more......and do tutions is required for any subject.....can i give both group of final in june 2011 after getting registered myself in nov 2010........