I wish I could seen the cartoony images these are supposed to be based on. They don't look specifically cartoony to me, just wrong. And that comparison image makes many of the mistakes pretty clear. I guess my question is what cartoon images really look like this? links? pics?
Proportions: there is definitely a dwarflike quality to Ernie's body proportions. He was short, scaled smaller, but but still proportioned somewhat similarly to Bert. Are the photos of Ernie and Bert protos in scale with each other or is the Ernie pic more of a closeup (if the pics are in scale Ernie's got a bad case of encephalitis and needs a headshrinking)? Ernie prototype is to Ernie puppet as Mini-me is to Dr. Evil. It looks like a Sesame Baby Ernie, not a full grown Ernie.
Likeness: already mentioned what I spotted on Bert (headshape, noseshape, browshape, eyeposition). Ernie's eyes seem too big and the pupils aren't positioned right (think they should be slightly lower and slightly closer together). Also the ears in the puppet pic have a more upwards sloping halfheart shape. Both of their hair needs some work Berts looks like a black christmas bow on his head. I also agree that Bert's mouth needs to be open.
Detail: the extra thick stripes on the figures also contribute to the more cartoony quality. I'm sure its easier and cheaper to make big blocky stripes, but thats NOT up to the level of quality we've been led to believe F4A is aiming for.
The most cartoony elements to me (aside from the ones listed above) are ernie's undetailed tube-like arms, Berts arms have SOME visible folds to make them look like fabric sleeves.
Question for everyone - do you want to see Happy Bert? Flirty Bert? or Angry Bert? (I vote for angry - wasn't he always angry? Just remember him most that way)