If all digital certificates are the same, why choose anything but the basic certificate? Because all certificates are not the same. Currently, there are three classes of digital certificates as recognized by the CA/Browser Forum: Domain Validated (DV), Organization Validated (OV) and Extended Validated (EV). There is a common misconception that the only difference in these certificates types is cost.
The following Mozilla bug came my way via the Cryptography mailing list. The gist of it is that a Norton (né VeriSign) customer asked for a certificate with two-year certificate, and got one with six-year validity. I don’t precisely understand why the customer is complaining to Mozilla, but they didn’t get satisfaction with Norton, who wouldn’t do what they want.