What is the difference between a judicial review of errors by the California Environmental Protection Agency and a similar type of error?

'Judicial review of these two types of error differs significantly: While we determine de novo whether the agency has employed the correct procedures, "scrupulously enforc[ing] all legislatively mandated CEQA requirements" [citation], we accord greater deference to the agency's substantive factual conclusions.' " (Preserve Wild Santee v. City of Santee (2012) 210 Cal.App.4th 260, 275 (Preserve Wild Santee); San Diego Citizenry Group v. County of San Diego (2013) 219 Cal.App.4th 1, 11-13.)