Taxak S, Gopinath A, Saini S, Bansal T, Ahlawat MS, Bala M. Saudi J Anaesth. 2015 Oct-Dec;9(4):446-50
40 patients were allocated to either the i-gel or ProSeal group. Insertion of i-gel on first attempt was successful in 17 of 20 patients, compared to 16 for ProSeal, and was faster to insert. Authors conclude ProSeal provided the better seal but insertion was easier with i-gel.
Link to abstract