I bought my 05 instead of an 06, I love it, the door lock button doesnt bother me at all because when you push the door lock button up or down on your door, it does the same thing to the other door in the car, so there either both locked or both unlocked.
The only thing that bothers me is it looks like theres a button next to t/c and theres no button, were on 06 it looks the same but you can actualy press that button.
As Far as the 06 taillights, way better depending on the color of the car,
I was gonna buy impulse blue, and the red tailights looked horrible compaired to the 06 impulse blue. Yet I went with Cyclone Grey and the red actualy blends real nice, but im still gonna go look at an 06 Cyclone grey with the black taillights and maybe purchase a set cuz there def sicker.
05s do have the same exhaust/rear end as the 06s
Other than that, same car... other than the fact that 05s are used
Id look into if the 06s had the pedal sensor problem fixed, im not sure.
But since i bought my 05, it goes in and out of this "safety mode" and it seems to be a common problem in 05's with the pedal sensor some say after replacing it never happend again others say it had to be replaced multiple times.
I still have to bring mine to the dealer to have it looked at but i dont wanna stop driving my car for a cuple days yet

Usualy it lasts for like, 1-5 startups then goes away, car runs normal until it happens again 10-20 startups later.