seatguru.com exists because different airlines have different configurations. For example see Lufthansa's
747-8i seat map and note the comments on row 49.
The best seats in economy appear to be 21 b/c h/j and 23 d/e/f/g.
Tightslot - agree with your comments, other than to note that landing gear are made by third parities, not the manufacturers, not that any passenger would notice any difference.