Misleading, deceptive, delusive, delusory all mean having an appearance or character that leads one astray or into error.
Misleading is the general term applicable to something which, intentionally or otherwise, leads one away from the right course or direction in thought or action and, therefore, into confusion or error.
Deceptive applies chiefly to things that by their aspect or appearance give a false impression; the term need not imply the intention to deceive.
Delusive and delusory, though otherwise similar to deceptive, carry a strong implication of befooling or cheating as well as misleading.