How many confirmations does it take to reach 99% probability in Ethereum?

I'm trying to compare blockchain finality and I'm having a hard to finding like for like numbers.

For blockchain, it can achieve finality with a 99% assurance after a 6 confirmations which is about an hour I think.

How many confirmations will get me 99% assurance in Ethereum? Would be great if there was some source you could point me to to verify that you are correct. Have been googling like mad and while I keep seeing the number of confirmations it takes to reach finality in Eth, no one states what probability this is.