Why Alberta has identified more variant cases but they're believed to be more prevalent in Ontario

Like with so many things related to COVID-19 in Canada, tallying up variants of concern is complicated — and interprovincial comparisons are especially tricky because every province measures and reports its data differently. Alberta and Ontario are a case in point. https://www.cbc.ca/news/canada/calgary/alberta-ontario-covid-19-variants-interprovincial-1.5960517?cmp=rss #news/canada/calgary