Sorry man, but no. This is this is the SAME Ganondorf from OOT and WW and every other game, his personality and thoughts are revealed to us through many games, not just one. He may have been "generic" in TP, but it's okay, because this isn't his first appearance, and even if we do go solely by TP, he shows more of his personality and attitude through his actions then Demise.
Meanwhile, Demise gets shown at the very end of the game, his speech basically boils down to "I'm going to kill you and all your friends, and then I'll take over the world" Followed by when he loses "I curse you, me and Zelda to have our descendants/reincarnations to fight each other in an endless loop forever!" this is very generic, there is nothing unique about demise. Even his appearance is like what if Ganondorf and Akuma had a baby.