QPlainTextEdit text format question

In the following code example, I'm comparing the text in a QPlainTextEdit (txtNotes) with the text from a QSqlRecord (rec)

Code:

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txtNotes->setPlainText(rec.value("notes").toString());
if (txtNotes->toPlainText() != rec.value("notes").toString())

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It always evaluates to true, even though the text from either hasn't been edited. My theory is that QPlainTextEdit is altering line feeds. Would this be right ?