Complex sentence: Day-to-day operations of the company were left with former owner Slim Williamson and, unlike what had been done with Little Darlin', Audio Fidelity did not identify itself as the owner of Chart Records on the labels of its releases.
Split into simpler sentences: Day-to-day operations of the company were left with former owner Slim Williamson. And unlike what had been done with Little Darlin', Audio Fidelity did not identify itself as the owner of Chart Records on the labels of its releases.