FM is using 767 (1 daily) and 738 (3 daily) on this route, MU is using 332, 346, 340 (-300?), and a number of 321 on this route. Beside Airbus vs Boeing, no big difference on age of these metal really.
MU service is not very consistant, because there've been served by a number of sub-companies (only the 346 and 332 are Shanghai based). As a regional airline, FM is all Shanghai based crew, so very consistant.