At the beginning of the Return of the Condor Heroes, we saw that Li Mo Chou managed to kill Lu Liding and his wife rather easily. However, I suppose Lu Zhanyuan was surely better than his brother in term of martial arts as it states in ROCH that:
"The two of them [Lu Luding and his wife] thought that although Lu Liding is not a famous name, his brother Lu Zhanyuan’s and his wife He Yuanjun’s valour was famous throughout the Jianghu world, the Lu manor of Jiaxing was a name that everyone in the Jianghu realm respected."
Could Lu Zhanyuan manage to win in the fight with Li Mo Chou?