You can't just take one similarity and note the irony of the situation because the situation is completely different in all other aspects. It's like saying it's interesting how the four Greats all have the same level of martial arts, but Hong Qigong is regarded as the only hero amongst them!
There's tons of other factors, and it's really not surprising or interesting at all that XF is toted so much higher than Wuji. He was created as more or less the perfect storybook hero while Wuji is not.