Taildragger QF also got Boeing to put more UD windows on the 742...err...too! Also, re the donks, the new 747-8 will be using the same ones as the 787....hmmmm.
Nope, the 748 has a smaller fan diameter, and its not bleedless like the GEnx for the 787.
About as close as the RB211 on the 747 is to the RB211 on the A340.