I tend to use testssl.sh (https://testssl.sh/), are there any major benefits to sslyze?

I’ve just tried running it a moment ago to compare. The output isn’t as organised/readable and it includes several tracebacks for failed checks (tlsv1.1, tlsv1.2, tlsv1.3, and compliance against Mozilla TLS configuration).

Always open to different tools but it seems testssl.sh is currently more complete

I've been using https://www.ssllabs.com/ssltest/analyze.html for years now. Any major benefits to either of these?

testssl.sh allows you to scan stuff inside private networks, supports custom ports/SNI, and things like StartTLS.