That is 100% Cavendish. Orinoco does not have the pathiness to the trunk.
Here is one of my Dwarf Orinoco`s.
Mike
{{gwi:402911}}

Thanks Mike, a picture is worth 1000 words.

Definitely Cavandish. Orinoco is not prone to thsoe little black fungus attack marks. Not much is as fungus prone as Cavendish. Orinoco also survives very mild frost and Cavendish does not.