yeah, the seats in the 03-05 are the seats the Aurora used from 2001-2003. After the Aurroa was discontinued the Bonneville used the seats. The 2000-2002 Bonneville seats had the open headrest and perforated leather. The 2003+ seats are solid leather.
(my aurora seats.. should look identical to your seats minus the color maybe.)
Bonneville seats 2000-2003:
The Aurora seats are much stiffer thant he Bonneville seats, but, atleast they have much better back and leg support. I can't stand the seats in the 00-02 Bonnevilles..