Now, my impression of Flav has been formed from following F1 and a film called The Four Year Plan about his time as part owner of QPR, I certainly didn't get 'intelligent' from him. Ignorant, indecisive and a bully yes, but intelligent no.
Alonso said that from the outside they are very different, but without media around, Briatore and Dennis were very similar. In that feature, they did a visit to Renault factory, Flavio was around, and I was surprised to see how serious and "work-like" he looked, as he was surprised by the cameras.
Or could be that Alonso said that because Flavio secretly communicates with Ron-speak when no one is looking? Or maybe without media around, Dennis speaks with an Italian accent and lots of gestures? Who knows.