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.
Yes you can say it because it is really visible but the reality is when these two increase it's price then everybody who HODLs tons of amount will be an instant billionaire, especially litecoin, imagine you can bought it now for less than 1dollar each and HODL it for a very long time till it hits 1dollar each.
I highly recommend for those who have great patience to buy altcoins that has potential to grow unexpected in the future, like ethereum and litecoin.