I have seen a Number of 380's about and I saw a Kia and a 380 Parked next to each other and something hit me...
The 380's Rear Looked like a Kia Shuma or Spectra's Bum...

http://www.auto-redaktion.de/images/Kia-shuma-4.jpg

http://us.autos1.yimg.com/img.autos.yahoo.com/ag/kia_spectra_ex_2005_exterior_5_346x270.jpg

Of Course they are Way easy to tell but It looked similiar....

Yeah they do a bit, but they are all startin to look the same these days arnt they :D

yeah.. if u start to look at all he newer cars it seems to be that the rear bumper tends to stick out more then it use to giving the car more of a 'bum' then it use to. I honestly think that it somewhat promotes safety in some way as the car that rear ends you has to make its way through 20cms of plastic compared with 5-10cms before it actually hits your vehicle. In that case it is probably more likely to protect your vehicle then the older style bumpers.

This is just my opinion, whether or not it is true is another question; though there has to be a reason for change and apart from style I believe that the manufacture may have made the bumper larger to make people perceive the vehicle as a safer car.