I prefer with ETH, because ETH prices are more stable and very promising gains in long-term investments. Indeed at this time the price of ETH is low, and when this is suitable once buy ETH for hold.
yeah, i also prefer ethereum.
as you said the price of etherum is still very low, but that does not mean that etherum has a low value.
in the future ethereum will pump
(likely to occur in 2020). so, if told to choose one of them then i will choose ethereum as an investment. cardano is indeed a good coin, but for me personally ethereum is more profitable and ethereum is also very suitable to be used as a long-term investment.