Today's research best link :) is http://www.flappening.watch.
This website compares Litecoin with Ethereum in many different aspects. I guess it is worth to have a look once a week and see if litecoin gets closer to Ethereum - pen if Ethereum getting even more in advance of litecoin.
My personal opinion is a 'flappening' of litecoin and ripple this year - but maybe not with Ethereum.