Is there a? Difference between a? Patent foramen ovale and? A patent ductus arteriosus?

Yes. A patent foramen ovale (pfo) and patent ductus arteriosus (pda) are conditions that allow fetal circulation to flow. Once the infant is born different blood flow patterns are required to oxygenate the blood. The closing off of the pfo and PDA allow the blood flow to assume the normal post natal pattern.
Yes/location. PFO is located between the upper heart chambers. PDA is a short blood vessel between the main blood vessel going to the lungs & the aorta that sends blood to the body. The PDA allows the blood to bypass the lungs when they are not in use, cutting the work of the heart during pregnancy. It is supposed to close after birth, allowing the blood to enter the lungs to get oxygen.