Comment by ezzaf

Worse in one specific regard, yes. And they agree with you in their conclusion, saying dust during processing is likely a factor.

You can see the full study here:

https://onlinelibrary.wiley.com/doi/10.1111/resp.14625

> In conclusion, this study is the most comprehensive assessment of the physico-chemical characteristics of dusts generated from a wide range of resin-based engineered stones (of high- and reduced-silica contents) and the first to assess how these characteristics relate to the lung cell response, at a scale large enough to potentially identify components of these materials that could be linked to the severity of disease among ES workers. We showed that exposure to high levels of RCS dust during ES processing is likely contributing to disease severity in this occupational group, however, other inorganic components of ES dust, in particular Co and Al, may also be strong contributors. Furthermore, some of the highest inflammatory responses recorded were observed in non-engineered stones, further supporting the view that components other than crystalline silica may be contributing to the pathogenesis of severe silicosis. The outcomes of this study have important implications for future regulation of ES products as they challenge the common view that reducing the crystalline silica alone will eliminate disease risk.

The key take-away I get from that is that it's not silica specifically, but something else about engineered stone that is making it so unsafe to work with. And that's why they are banning the whole product class.