On paper, Kongo should win this fight easily. We would like to think otherwise because Barry is a likable guy and his standup is admirable but the fact remains, he will be heavily disadvantaged in the height and reach department. Furthermore, Kongo will be much stronger and even super stronger with added leverage.
I have envisioned the fight to be somewhat like this:
In the first round, Barry will utilize the cage and try to stick and move. However, he will soon find out the height and reach disadvantages will make it too difficult for him to stick and move without getting hit in the process. Round one will be occupied with testing the reach department and a lot of dancing.
In round two, Kongo will soon realize Barry is timid. Kongo will stalk Barry and force the action and eventually stops Barry in his tracks.