not according to the pics apple has released. the only difference is the 32GB model will of coarse say 32gb. So anyone that's savvy enough to know the difference could tell if they get close enough, and you don't have a case on it.
why do you care? are you one of those people that has to make sure everyone knows you have the latest and greatest?
No, I doubt if i even upgrade I got a white 3G 16GB, there is no reason for me to waste $500 on upgrading, i will just wait till next year? I herd this and just did not know if it was true.