The main difference newbies should know about SedoPro and Sedo is that, SedoPro gives a higher pay($) for each click compared with Sedo.
Newbies are often caught on the wrong foot on this. They buy traffic domains based on traffic screenshot from SedoPro and expect the same revenue with Sedo. Worst case they won’t know there is something called SedoPro or fail to spot that the screenshot is of SedoPro. Whenever you are buying traffic domains based on screenshots make sure you clearly find, if it is from SedoPro or Sedo. If you are not sure, simply ask the seller. Most reputed sellers will mention this fact.
There are other differences, but this one is the most important as everything finally boils down to the revenue factor.