The difference between a botanical style and a floral style is that the botanical style emphasizes accuracy whereas the floral style emphasizes an overal pleasing artistic style. Furthermore, painting in a botanical style is very precise and very detailed, on hot pressed (smooth) paper, with no background except the white of the paper. On the other hand, painting in a floral style has a painted background and my paper preference is to use cold press paper, which is slightly textured, or hot press if I want to add more details.
Botanical style
Floral style