I'd say Sasuke is in the worse position here unless he has a trick up his sleeve Oro isn't aware of. In the end I doubt Oro really ever believed Sasuke would simply hand over his body, yet he was training Sasuke to get stronger, so he must have a master plan or a few to claim that body. Considering he was the one training Sasuke he already is pretty aware of his abilities, so let's hope Sasuke found some new sharingan power or other ability Oro didn't predict.