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I'd suggest doing this search on Youtube. I found a couple of good videos on the differences when I was deciding. Not all of the inputs on the BX support 4k greater than 60hz (some do). Also more of the inputs are on the back of the TV instead of the side, including the HDMI ports supporting 4k at 120Hz were on the back of the TV. Also the ARC port is in the back. That was huge for me as I was hanging my TV and those ports are much easier on the side like in the CX. The videos I saw showed minor differences in picture quality, but I don't think I would notice them other than when they were side by side.
Sorry, there was a problem. Please try again later.Please see the link for a side by side comparison of the available links for the two TVs. All the ports on the OLED CX series are HDMI 2.1 ports and HDMI 3 is an HDMI eARC port versus only ports 3 & 4 on the BX being HDMI 2.1 and the other 2 are version 2.0. ^Daphane https://www.lg.com/us/compare?bizType=B2C
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