The investor's interest in Ethereum is greater than that of Litecoin. Even though Ethereum does not have a supply limit, the smart contracts owned by Ethereum are a very powerful mainstay to increase investor interest. The Ethereum smart contract also has a great opportunity to increase the price of Ether, because the investment in the token goes through the Ethereum smart contract. The issue of the emergence of Ether2 can also change one's mindset towards Ether.
As they always say, "the sky is the limit". While theoretically Ethereum should have a lower price than Litecoin, the demand for ETH on the market is booming. People are quite fond with ETH than they are with LTC.
Even when ethereum is still facing a big problem with the scalability and ethereum has more usecase compare with litecoin. If litecoin mostly used to be a payment system and ethereum can do that too but litecoin can't be used to issue the tokenization or build the defi project. people are seeing it from the use case.