I have secured 14 (window seats) on my LHR-DXB-LHR flights for next month. Reviewing what seatguru has to say about these seats, it's as good as 64A (but I guess not as good since it's in the main deck + there are middle row seats + potential swap with 50J configuration 744s would mean I would loose my selection).
But if I had row 14 window seats secured and there is no equipment swap, would these seats be similar to 64A?