Nice test there.
Read PCMag review on Sophos Home. It too mention very strong url blocking malicious/phishing but average signature protection. Sophos mention it has behavior blocker with not much details but seems BB is kinda non-existent.
Lets see what future holds for Sophos home as it does looks promising & good especially for average users.
If you can then a test request here. Teste Sophos Home with zeroday malware i.e no url test i.e malicious samples collection & scan with Sophos Home & delete the detected threats. Run the not detected threats & see how Sophos performs...this would be interesting to see with atleast 15-20 good not detected malicious samples.