If there's anyone well versed in comparing studies, I'd be curious if similar methods were used vs this study, which says: Chloroquine is a potent inhibitor of SARS coronavirus infection and spread. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1232869/

I realize they are chloroquine vs hydroxychloroquine, but it's curious that hydroxychloroquine was so quickly dismissed (seemingly without evidence at the time) for Sars Cov 2 vs chloroquine being found effective for Sars Cov 1.