Are these two words? There is no difference, the two are just a simple relationship between different characters, the latter is shaped according to the shape of Xiaozhuang.
Shuowen Jiezi
"Volume Three" "Yanbu"·Shuo Shuo, interpretation. Follow your words. Let’s talk for a day. Lost all enthusiasm. Also, Yi Xueqie
phonetic. Cong Yan, Dui (?duì) sound. Original meaning: to explain, enlighten, explain with words