So far as I can tell the specifications are identical, and, to confirm, both TVs have both freeview hd and freesat hd tuners (the comment below the linked article is wrong). The main difference is that Currys only offer a 1 year manufacturers guarantee and John Lewis include a 5 year guarantee in the price. JL also have a no qualms within 3 months returns policy, whereas Currys don't allow returns on opened items.No difference according to this site:
Difference Samsung 6000 serie: H6400 H6500 H6700 H6670 H6200 ~ LED TV reviews