answering my own question: yes currently TG614 is a 747 with real F service and not just F seating like in August. However I had on this flight one of my worst F experience on TG (no the crew tried hard and can not be blamed). Maybe some more details in another thread.
on the positive side ,maybe it was good not to have a terrific F experience on this flight as this would have been too much in contrast to the nightmares at PEK airport...