777 footstool from my TR:
747 footstool from Genius1
's TR:
777 is probably marginally better and the IFE is significantly better if you get the latest version.
However I have never been in the nose of a 747 and as these aircraft will not be around for much longer feel that it would be a shame to never do it. Accordingly I would be inclined to book 747 F if you have not done it before.