Why do you choose between Ethereum and Litecoin, bro? Why not Ethereum and Cardano or NEO, for instance? ETH is very good. I do believe, this altcoin will be a gainer close to the end of this year.
maybe the OP think if bitcoin is gold, then litecoin is silver,,
because thats quote born from the past,,,
but, i still believe with that my friend, because litecoin is an old coins that already survive in any market conditions,,
so i think its better if the OP take ethereum and litecoin for long term,,
but, don't forget to look anothers cryptocurrencies,,

Ethereum is the real silver and litecoin is nothing right now. It's not even included on top 5 coinmarketcap and that's so strange to call that as silver because litecoin is an alternative blockchain for bitcoin when it was getting a lot of problem with its scalability problema and this time the situation looks so different.