In short, no. Lecithin is a type of fatty substance which occurs in plant and animal tissues. As the name suggests soy lecithin is derived from the soy bean. It is safe for people who have celiac...
The most different point is the composition of lecithin. Here are some numbers:
Peanut lecithin: PC=49%, PE=16%, PI=22%
Soybean lecithin: PC=21%, PE=22, PI=19%, PA=10%, PS=1%, Glycolipid=12%
This...