Generally speaking, X-32 is more advanced than F-35, but it has the following defects: 1. Because it is too avant-garde, many technologies are still immature. The United States has suffered such losses before, such as F-11,which is called a living coffin in the air, so the technology tends to be relatively mature, a bit like the F-35 of the F-22 single-shot version; 2, too expensive, the cost is difficult to guarantee; 3. The air inlet is too big, so you can clearly see the blades of the engine inside. This is a large RCS (radar reflection area). Although Boeing promised to have new technology to eliminate radar reflection signals, the US military still dared not take such a big stealth defect. 4. Boeing has not entered the military aircraft market for decades, and its contacts are much worse than Loma.