Everything always reverts to the mean...
Meaning this - there has always been a historical price difference between the price of platinum and palladium. The mean price ratio is the normal difference between those prices. I do not have the exact numbers now, however, today's price action does a lot bring back into balance the difference in price between the two. In other words, the gap in the price is narrowing back to normal.
Platinum 808.00 -17.00
Palladium 193.00 +16.00