* CE marking indicates conformity with health, safety, and environmental protection standards within the European Economic Area (EEA). It's a self-declaration in many cases, meaning the manufacturer declares their product meets the relevant directives.
* CSA Group (CSA) standards are developed by CSA Group, a Canadian standards development organization. CSA certifications demonstrate compliance with specific Canadian and sometimes international standards. They often involve third-party testing and certification.
A product might meet both CE and CSA standards, or neither, or one but not the other. The relevant standards and their stringency vary depending on the specific product and its intended use. One standard might be more demanding in certain aspects than the other for a particular product, while the reverse might be true for a different product. There's no universal hierarchy.