Apart from obvious changes, such as maybe number of adds, is there any reason you would do less damage in a normal version of the boss fight as the LFR one.
Do the bosses have lower armor on LFR than normal mode?
For example, lets say you do 100k DpS on Council LFR (3rd boss of ToT). Is there any reason you wouldn't do 100k DpS on Council normal mode (assuming 25 man as well of course)