Both model ranges use the X1 Ultimate image processor to deliver upgrades like "super-resolution" and object-based HDR remastering. They're also the first sets to include Netflix's Calibrated Mode for fine-tuning the picture when streaming shows. The choice mostly comes down to whether or not you're willing to sacrifice size for the A9F's higher contrast ratios and true blacks (or just really, really like its display-as-speaker technology). If you crave a big screen, the Z9F is still impressive based on our early experiences.
Update 9/6: Sony told us the prices it provided were off by a wide margin due to a gap between the suggested MSRP and the actual price. It originally said the sets started at $4,500, but they're approximately $1,000 less expensive across the board. We've updated the article accordingly. Suffice it to say this is much, much more alluring if you were considering Sony's take on a premium TV.
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