Your benchmark is more than 6 years old, on a 2014 Macbook, with a strange choice of terminals. LWN's article on the subject is almost as old, but with a better comparison: https://lwn.net/Articles/751763/ (2018)
It says Terminal.app follows closely behind the fastest. This level of discussion around “fast” terminals is funny to me. I’ve always used Terminal.app and never had a single problem. It turns out the default option is likely the best in this case.
For a recent take, though by one of the competitors, see https://tomscii.sig7.se/2021/01/Typing-latency-of-Zutty
> TL;DR; terminal.app on macOS is typically the fastest.
Even on macOS, that's probably not true, at least nowadays. See https://www.lkhrs.com/blog/2022/07/terminal-latency/ (2022)