No, he is not guilty of similar things. He could be storing his emails in plaintext on a public server readable by every single individual on the planet. It's not Hillary's lack of server security that is the problem. It's the existence and use of a private server for public business that is the problem. Trump's emails are his personal and business emails. They are not subject to national security classification rules. They are not subject to FOIA retention requirements. They are subject to whatever the hell Trump wants which may or may not include security to the extent that Trump demands.