The difference is there, as plain as day...you simply insist on ignoring it.  It is you who have lost sight of the issue.  An individual mandate to enter into a contract or purchase a particular product is literally unprecedented.

"Congress does not have unlimited authority to regulate private actions. If the Constitution does not give Congress the power to act, then Congress cannot act. Congress clearly lacks the constitutional authority to force individuals to have, or private businesses to provide, health insurance..."

Mathew Staver, Founder of Liberty Counsel and Dean of Liberty University School of Law

If Congress has the authority to require a person to purchase health insurance, then certainly it can also require that person to purchase such things as health club memberships, multivitamins and condoms.  The Constitution simply does not grant to Congress the authority to do that!

Regards,
Scott Perry