Hello!
There are some difference between this plants, however we can find some similarity too.
- We can use both plant's seeds to different purposes since both provide us with oil, rice, among other derived foods.
- Both are annual plants. Annual plants complete its life cycle within one year. The life cycle of plants goes from the germination to the seed production.
- Both plants have a non-woody stem. Sunflower and paddy plants are non-woody or herbaceous (herbs) plants.
Have a nice day!