>what's the false positive / negative rate of both approaches

the false positive rate is 100%. they just say everything is phishing:

"When we ran the full dataset through the deep scan, it caught every single confirmed phishing site with zero false negatives. The tradeoff is that it flagged all 9 of the legitimate sites in our dataset as suspicious, which is worth it when you're actively investigating a link you don't trust."

it's 100% for what they call "deep scan", it's 66.7% for the "automatic scan". Practically unusable anyway