Both are pots with high legs, the bottom has a lid, the top one doesn't. The short line inside of the top poart of both pots is the Bean. People cook the bean in the pot. It is an indicative character, the short line is the indicator for bean.
The big seal script for the character is
The short line for the bean disappeared, which actually is a pot with lid. However, it keeps the Bean meaning. I don't know why people eliminated the short line.
The small seal script for the character is
which is similar to its big seal script.
Its clerical script is
The current standard printing script is
豆very similar to the clerical script.
Its Pinyin is Dou4.