Compared to EOS, ethereum is an older coin with more experience in cryptography. The development of Ethereum has also been shown to increase from year to year, it may be the reason that Ethereum will continue to rise in price. Ethereum has also strengthened investor confidence
This is very true - and true for most tokens and projects.
Many projects like EOS have been excited to be on their own blockchains. If ETH went down, the erc20 tokens do too.
EOS has at least started to carve it's own path despite always having a beginning as a token.