Per cubic inch, platinum is significantly (75%) more dense than palladium. As such, platinum would be more efficient to use in their chief fabrication usage as an autocatalyst, if it were not for platinum's higher scarcity and cost. Also, palladium is far less recognized as a monetary metal, so overall market liquidity may be better for platinum products. Certainly, platinum's value premium to palladium suggests that it is a much better metal, but palladium values are approaching platinum prices, and it is possible that palladium prices could reach or exceed platinum prices in the future.