Wildcard SSL Certificate lets you protect multiple subdomains with a single certificate
There is no need to install a separate certificate for each subdomain. a Wildcard Certificate can handle them all.
This is a hassle-free cert ideally for entry-level deployments – a perfect choice for websites that don't deal with large amounts of user info or need to establish trust. It's great for blogs, startups and personal pages.
The Extended Validation (EV) SSL/TLS Certificate automatically displays your verified organizational information within the certificate details. The EV validation process helps boost customer trust by providing industry leading identity assurance.
OV-certificate (Organisation Validation) is a certificate that confirms the existence of the organisation. To get an OV certificate, the company must complete the validation process. During validation, the certification centre must ensure legal and existence of the company.