Ok so i calibrated booth of them using color munki display, and its still the same. Colors are 100% the same on booth of them. Only thing i can confirm is minimal (and with minimal i really really mean minimal) sharper text on the samsung. Nothing to make a fuss about and certanatly nothing to return a LG for!
also pictures:
Image
Image
the lines in the first picture can be ignored. The top is the samsung the second one the LG.
If someone could be so kind and tell me where colormunki saves the profiles i could upload the LG and SAMSUNG .icc profiles for you. It doesnt save it on /Library/ColorSync/Profiles/ because i have 3 colormunki profiles and cant find 3 there.