Transaction speed could be one of the most misunderstood metrics in crypto. In Bitcoin it takes an average of 10 minutes for a transaction to be placed in a block, while Ethereum takes ~14 seconds. However, just because it is placed in a block doesn't mean it is final since they can be reverted.
Determining if a block is "settled" is subjective since its finality is probabilistic, but we can say define settled as having a fixed amount of security spend (as measured by revenue to miners). Using this methodology it is evident that Bitcoin has the fastest settlement time compared to all major PoW tokens.

Read more on It's the settlement assurances, stupid by Nic Carter