that 2 coins was a good coin. but if i choose between the two it will be ethereum. ethereum is most trusted to LTC. eth was the second coin in bitcoin. And Many of us using eth wallet for our bounty campaign and to hold a lot of token.
They have both differences like ethereum is a smart contracts that can be use by others unlike Ltc is just a single coin. Ethereum based tokens or Erc20 meakes ethereum more in attention because most of the tokens that is now in the market is underlying on that blockchain. I am in ethereum and other coins but not and i never bought in my history.