Polat R, Aydin GB, Ergil J, Sayin M, Kokulu T, Ozturk I. Braz J Anesthesiol. 2015 Sep-Oct;65(5):343-8
Performance of i-gel vs LMA Classic was measured in 120 patients, with respect to successful insertion attempts, insertion time, peak airway pressure, regurgitation, fibreoptic glottic view and postoperative complications. i-gel gave a shorter insertion time and better fibreoptic view.
Link to abstract