The X85J has a much better contrast ratio and brightness. If you're watching any sort of HDR content, it's going to be a better set for that. Also a bit more future proofed with 2 HDMI 2.1 ports (and potential for VRR to come in a firmware update).
I'm not sure how much of a hurry you're in, but Black Friday is also coming up - there may be better sales in the next couple of months on TV sets.
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