The cases are different.
異なること
The spelling is wrong―The word is wrongly spelt―erroneously spelt―misspelt.
to look alike but be different
be different from one another
to break the law―violate the law―infringe the law―offend against the law
(兄弟なら)a half-brother―a half-sister―(子なら)―a child by a different father
There is definitely something wrong.