Yes ETH is faster than BTC, and this is one point for it, but if the only parameter of evaluation is the velocity there are more fasters coins like LTC and NANO, nano is instant. I usually pay with nano my coffe in my office. We bought a coffe machine and for each coffe we pay 0.50$ in Nano !
good initiative to pay coffee in NANO, it is off-topic, but good
regarding ETH and BTC, ETH recently has more transactions than BTC; and cumulative fee is greater than in BTC, so one could tell that ETH is more used than BTC lately, is that because it is better and faster is another subject
what is more important, both are not primarily good for everyday payments and would need second layer for that - BTC with Lightning network and ETH with services like Loopring