Sasuke has his full Susann'o and so does Obito, Obito's is basically Kakashi's to average the playing ground. Sasuke's full Susann'o would be almost identical to the one he used in the fight with Naruto, which is basically Indara's full Susann'o. Obito has both close range and long range Kamui, meaning he has the combat status of both Him and Kakashi [With the Influence of the Sharingan.] Also both of them are in possession of the abilities that derive from the 'Six Paths Of Pain, this includes the Human path, the Deva path, and Etc. This is to average up the prowess that Sasuke gains from both the Yang seal and unlocking his Rinne-Sharingan through this seal.
A reasonable place for this fight to take place would be finally valley, and they both have a standard chakra supply [This is a limiter to Obito who seemingly has an abundance of chakra due to his excessive use of his 'Kamui.']