I think Kugan Cassius fucss him up bad. Adrian won't be able to retreat into his turtle half-shell, because Kugan will just grab hold of him and slam him into the pavement. Also, Kugan is much bigger, plus Adrian is coming off a robbery decision against Manny and that might affect him mentally knowing he was robbed of an epic victory.
Kugan used to be security for Ricky Hatton back before IFL TV, so I imagine he'll have some closed quarters training like Jiu Jitsu or wrestling. That plus the size, I'd take Kugan.