I just flew in J class on LX A330 (TLV-ZUR-JFK), and on LY 747 upper level (JFK-TLV), Beside the fact that on LY there is almost no privacy from your neighbor (which in my case it didnt bother me as I flew with a friend of mine), cuz the seat is right next to you, but the lie flat bed on it was way more comfortable then on LX, (on LX you lay almost on the floor and the seat is a wall for you, VS on LY that the bed is the same height as its in seating mode), the service was better.., You got on board kosher milk, wine... I really enjoyed it !!! Totally the opposite of the reports I got here saying that LX is way better then LY!!!