Ok here is what I learned about different models offered in different years. I don't know much about spyders or Quattroportes. I mainly researched Coupes before buying a 2006 Coupe GT.
I have only been around a few months and been an owner for a few weeks. This is by no means complete so please correct me and make additions. Treat this like a Wiki. Post changes or addition/deletions and I will edit this post within the thread...
Coupe 2002-2006
2004
•Coupe Cambiocorsa (F1 style paddle shift transmission abbreviated CC) transmission improved over previous years and fewer problems reported
2005
•coupe body changed (front and rear bumper and larger grill)
•Offered in CC and GT (6 speed manual transmission with 3 pedals, a “real” clutch sometime
•abbreviated 6M/T pr just 6M)
•cupholder added
2006
•No change in body from 2005 except for different grill (vertical bars rather than wire mesh)
•Coupe offered in GT and CC transmissions
•Some 06 GT strippers (no option models) in black on black and silver on black imported into US
Gransport 2005-2006*
2005
•start of Gransport (sometimes abbreviated GS) model (offered as an LE option package?)
•Not a change to Coupe, rather a different car resembling the coupe
•Different front and rear bumpers than Coupe and “surfboards”
•Sport tech fabric interior
•Only offered in the F1 style paddle shift transmission
•Superior shifting compared to previous models with F1 style transmission
2006
•full leather interior option rather than only the Britex
MC Victory
Alacantra (“Suede”-like) interior
MC12 racing seats
Limited production (180)
GS Spyder added to the line
*2007 Gransport (only available in Europe?)
Options (not sure what year they were offered...
Xenon headlights
Factory Navigation
Vintage package (?)
Leather headliner
Stereo options (CD changer)
Skyhook suspension
Wheels
Carbon fiber (interior steering wheel, console…)
Spoiler
Heater seats
Popular Aftermarket modsExhaust (laneri, tubi, …)
DBW (Formula Dynamics Drive By Wire)
FD springs