LTC is stuck to lite version of Bitcoin motto. Ethereum is being actively refined and updated and Ethereum is the prime fuel for ICOs.
Both coins are great and still profitable. But I believe Ethereum would be more beneficial than Litecoin in the long run.
I think that LTC is more prifit ratio coin : ) i has not gone like x40 in year LTC went just less.
So rise pottencial is bigger in LTC in short them i long NO ONE REALY KNOWS : )