I don't know how the mineral ingredients of a fuel cell stack compare to a lithium battery, but assuming they're the same, a fuel cell vehicle has significantly less of them. For example, the fuel cell stack in the Toyota Mirai weighs about 19kg and is complemented with a battery that weighs 45kg (1, 2). In comparison, the Tesla Model 3 carries a battery weighing 480kg. Therefore, a BEV has about 6.5x as much stuff of questionable origin (and questionable disposal requirements) as a FCEV.