You know that this also started me thinking on? Baby Scooter. Early on, it was mentioned that Scooter was stuck as the "smart one" since a more realistic Baby Scooter could possibly be translated as the other Babies bullying him. While this could indeed be the case, it started me thinking.
Now with Baby Skeeter, she sounded identical to MTM's Baby Scooter. And had adult Scooter's clothes scheme, with the light green shirt and blue shorts (Scooter's token outfit was a green jacket and blue jeans.). As for her personality, take away the jock role, and she also has adult Scooter's bratty streak and personality. Granted grown up Scooter was a lot more subtle, but he had his way of subtlely setting off Miss Piggy with an "innocent" remark, or using his uncle's position of power (Owner of the Muppet Theatre) to get something he wanted.
So it's indeed an interesting observation how Scooter had a twin sister, Skeeter, but that they made SKEETER to take after the adult Scooter, more than his own baby version ever did.