Please let me know if there is any differences between poison oak and poison ivy?

Difference in leaf: The poison ivy is leaf is composed of three parts on the same level each the shape of an arrow head. See www.Poisoncontrol.Org on their plant section for a picture. If you flatten the sharp edges and make the leaves rounded like a pin oak you have the poison oak. The sumak is a long multipart fron that resembles more of a fern than a regular plant leaf, its small leaflets are similar ti the ivy.