While they are great for hobby projects and personal sites there are some differences. For example, they are not for commercial use: "Class 1 certificates are l

While they are great for hobby projects and personal sites there are some differences. For example, they are not for commercial use: "Class 1 certificates are limited to client and server certificates, whereas the later is restricted in its usage for non-commercial purpose only." via https://www.startssl.com/policy.pdf https://www.startssl.com/policy.pdf