>>42505977They both have wide shoulders, that gorilla's just being shown at an angle and the Rillaboom in the OP is flaring it's chest out with it's arms spread like a cross. In normal in-game circumstances and it's official art
>>42498044 Rillaboom has the same shoulders as a typical gorilla.
Rillaboom is a fucking gorilla dude. The other two are bastardized anthros of their respective species but Rillaboom's just a badass ape with a Jojo hairstyle.