bestorderflow requires level 2 data as this requires too. bestorderflow has a discord group where results ar posted and they are impressive, but it costs 1500usd. Regarding to comparison with other tools, I haven't done however the best test you can make with this kind of tool is to watch the levels with the most significant volume and see how the prices reacts to it. In my opinion any match with other tools is not relevant, if it gives me reliable info is what it matters.