I agree it is better but it's not HDR like I've seen on displays in store. I only got this TV last xmas so not sure I can justify buying a new one yet. I would love a 65" HDR setup though.
I upgraded mine to the 49UH850 a month or so ago after buying an Xbox One S. The difference with HDR is definitely worth it.
Only problem was my 1080p all in one blu-ray and reciever also needed replacing for 4k and HDR passthrough. I didn't go high end by any stretch of the imagination but it's been a full upgrade of my home entertainment system in the end.