I will go for ETH any day if you ask me as I'm comfortable with it and never tried LTC. ETH is fast enough for me and with low transaction fee. It's next to bitcoin so I think it's good enough.
Many people would choose Ethereum over LiteCoin because LiteCoin isn't the best rival for Ethereum although LiteCoin is released earlier than Ethereum but Ethereum has the widest scalability and almost ICOs today were based on Ethereum's ERC20 platform standard.