Yes but thats in no way is to say that because too don't agree on scripture one is in darkness and the other isn't... one could be ahead of the other in knowledge of the word, as we were behind once in scripture study when we first started out... and still behind in full knowledge of the mysteries, so are other just getting the milk and not the meat as Paul put it.
BUT once one is shown clearly by the word that the church or doctrine they follow is not sound in bible doctrine... they should leave that place... with thanks aand fear... thanks to the Lord that they were given the wisdom by Christ to know thier church is spreading false doctrine... and fear, lest they move to a worse den of vipers... If one is shown and does not break ties with false teaching, they could be trapped in it for a life time and maybe there after.
Daaaaa King