And with an x3 lower average fee which you successfully managed to omit from the equation.

isn't it because ETH tx is much smaller(roughly 1/3 bitcoin tx)? the Fee/byte is still roughly the same
It's about 1.29x higher in ETH! Although fees are computed differently in ethereum but working with raw bytes and amount paid we have
____________________ | ETH | BTC |
Average tx size in kBytes | 0.23 | 0.707 |
Average tx fee | 0.005500000 | 0.00042000 |
fee/byte | 0.000023910 | 0.00000059 |
fee/byte in USD | $0.029 | $0.022 |
Ratio | 1.29 | |