1A. The J-20 has the same wing span as the F-22, but is longer. This means that the J-20 can carry more fuel internally to fly farther
(12 tons of fuel for J-20 vs 9 tons for F-22, which is about 33% more capacity):
EDIT: I'm discontinuing this topic since most of the contents were obtained from a military fanatics forum, and I might inadvertently be disclosing military secrets...