Differences between ECC 6.0, 4.7 and 4.6

I want to know about the additional features of ECC6.0 when compared with teh older versions...Where can i find the related documentation...Dont say that it is in the release notes...as i have seen many new transactions which are not documeted in the release notes for the differences between 6.0 and 4.6...And, i dont see 4.7 as an option in the release notes...Any ideas....I will award maximum points for the perfect answer(s).

Thanks,