Must admit I never noticed the Iguanodon lips - I'll have to watch it again.
One thing puzzles me though - WWD was supposed to be scientifically accurate
but took a very conservative view of the science,
whilst WDR took the opposite approach and put feathers on everything.
_This_ is conservative. (Even though it wouldn't have been 10 years ago.)
But if it was just about satisfying the public view, WWD was very light on gratuitous dinosaur violence.