I'm booking an award ticket using UA miles from FRA to IAH.

I have the following options:

Option A - Direct with old LH Business Class
LH old Business class direct from Frankfurt (FRA) to Houston (IAH) (LH 440 on A380)

Option B - Connection with UA Global First and Domestic Economy
UA Global First from Frankfurt (FRA) to Washington (IAD) (UA 988 on Boeing 777-200)
then
UA Econmy from Washington (IAD) to Houston (IAH) (UA1577 on Boeing 767-400ER)

What would you take?