F (even UA F) > C.
UA F: Great seat, so-so food, biz wines, great IFE; very good to excellent crews (IME.) IFL lounge (if available) are good, much better than C lounges.
LH C: good seat if 747-8, otherwise crap slanted seat, so best to avoid; okay food and wines, more limited IFE. Crews good, but more formal than UA.
Now if you can snag LH F, take it! Very good seats, great food, drink and crews. LH F terminal is fantastic.