bitcoin is techically more superior then ETH ,yes but the use cases are bigger for etheruem now!
real utility for ETH ARE BIGGER.
ETH: defi, icos, dapps, stable coins.
also the very good liquitity !!
BITCOIN ?
yes you can buy thigns with btc but so you can do with ETH.
You can't actually compare both in terms of volume and price because one for sure defeats the other one from it.
Both are aiming for different purpose in terms of how it is utilized.
Say you're a programmer, you're like comparing different programming languages that even aims different for its purpose but aiming generally to be a digital payment.