I think buying either brand will be a HUGE upgrade. I got the C1 at the end of October and I'm blown away how terrific everything looks--- both blu ray and 4k! Current films that are shot digital are the huge show off pieces in particular-- pop in a super hero flick or check out the John Wick trilogy--- OLED is the best and I'm never going back!
Agree that Costco is the place to buy--- 5 year warranty (currently free with purchase)... if my OLED craps out on me I'll just be getting a new free TV most likely...