Based on history they are probably similar. I haven't seen the LG this year. I have owned the Samsung for ~2 mos., and once I turned off the Eco Sensor, and switched to Movie mode, I have yet to see any fluctuating blacks or brightness, anymore.
They both have reflective screens, but it isn't that big of a deal for me, as I can vary the lighting, as needed, and it's just a secondary TV. I think I read the LG is at least a little more reflective, if it matters.
Very few problems with this Samsung this year, just a few defectives, as usual with all TVs. Also, note the Samsung is 43" and the LG is 41.6"
; it makes a little difference. Hopefully some people will chime in with any problems with the LG this year. Weights and styling are similar.
I have read virtually nothing on this LG. I can just tell you that the Samsung is impressive once it is dialed in with the right settings. Heck, out of the box it was nice, just not realistic, as few TVs are, anymore.