Again not HUGE difference. For long term value I would blindlessly go with Qeld over any Oled on the market. You don't have worry about taking extra steps to make sure it doesnt get burn in within a year or so. Qled can last with you for years until you wish to upgrade for better technology not because your tv got fucked
But even the Q90s have the bloom effect / dimming problem. It's fucking horrible imo (especially if you're using subtitles) and for the price of a q90 you could just buy an OLED and be happy.
And even the newer and pricier qleds are doing this.