Which pageant was competed at by both Mariana Coromoto Jimenez Marinex and Pia Wurtzbach? 
Mariana Jimenez: Mariana Coromoto Jiménez Martínez (born December 1, 1993 in Caracas) is a Venezuelan model and beauty pageant titleholder who won Miss Venezuela 2014 in which she represented Guárico, and also she represented Venezuela at the Miss Universe 2015, finishing as a top 10 finalist. Miss Universe 2015: Miss Universe 2015, the 64th Miss Universe pageant, was held on 20 December 2015 at The AXIS in Las Vegas, Nevada, United States. Miss Universe 2015:  Paulina Vega of Colombia crowned her successor Pia Wurtzbach of the Philippines at the end of the event.
Miss Universe 2015