I think it depends on the density of the network. If it's a tissue, I think it's going to be faster. But in some articles I read on average in 10 minutes Bitcoin was able to confirm between 3-7 transactions. Ether 15-25 confirmations in the span of 6 minutes.
I think the newer generation of Ethereum then he's trying to eliminate the flaws in Bitcoin. Indeed, the scalability of bitcoin is an issue that continues to be debated.

Source: https://phemex.com/blogs/what-is-transactions-per-second-tps