You cannot win an award you were not nominated for, so a 'wins Best Picture' market can never trade above the matching 'is nominated for Best Picture' market. Before nominations are announced both markets exist side by side, priced by people focused on the glamorous one, and the relationship breaks regularly. You buy the nomination leg against the win leg whenever the ordering inverts, which is a locked position regardless of who eventually wins.
Markets on Polymarket where nominee-to-winner conditional coherence is the natural play: