Menu Changes
Interior Modeling Denoted on Car purchase screen (Interior: Detailed, Interior: Simple, Interior: None)
All Redbull X Challenge Events Live
FT-1 added to Toyota Dealership My Mistake
Toyota Dealership denoted as NEW
New Mercedes VGT and Corvette Concept Seasonals @Ferrari458Italia
Vision GT Home Screen Image now cycles through 5 Images; RB Fan Car,Corvette concept, VGT, FT-1, M4
1/1 sec exposures in Photomode (NOT Race Photo) @smskeeter23
"0" setting for unavailable/not applicable parts in the tuning screen to "--". @shirakawaa
ZAGATO VGT image added @Zuel
All VGT Archives have image except: Lamborghini, Nissan, Jordan, Infiniti, Daihatsu, Audi
Menu Logos have changed in size and intensity @Hottracer88
Open Top Cars denoted as Interior: Detailed @deadbob777
Birthday Present Cars are Live (Happy Birthday @phosphor112 )
Physics Changes
Tire Model Changed (Longer to heat and cool)
Tire Sounds Changed
Tire Temperature indicator changes gradually (fades from color to color) and has more range (Cold) @shirakawaa
Real-Time Adjustment menu (RA) functional in Arcade Mode (NOT FUNCTIONAL ONLINE)
Brake Bias effect altered @Trux
Camber effect altered? @Trux
Ground contact results in more Sparks @Chrix12
Tire Smoke Altered @shirakawaa
Runoff Areas speed reduction increased @shirakawaa
PP Calculation changed (Being Debated NOT 100% on this) @Zuel
New Cars
Mercedes-Benz AMG Vision Gran Turismo Racing Series
2,000,000Cr
No Interior
1300kg
590HP
604Tq
624PP
Pic by @eSZee
Corvette Stingray Gran Turismo Concept '13
65,000Cr
Interior Detailed
453HP
460Tq
526PP
Pic by @eSZee
Gran Turismo Red Bull x2014 Standard
Interior Detailed
3,000,000Cr
560Kg
798HP
208Tq
920PP
Gran Turismo Red Bull x2014 Fan Car
Interior Detailed
6,000,000Cr
545Kg
1193HP
433Tq
964PP
Tracks
NO NEW TRACKS
Possibly Reworked(Less Detailed) Mt Panorama (Reduces Glitchyness??) @Ferrari458Italia
Red Bull X Challenge
Red Bull Standard Championship
Races: 5
Laps:3
Championship Bonus: Cr. 500,000
Gift: Gran Turismo Red Bull x2014 Standard
Silverstone Grand Prix Circuit
Gold: Cr. 130,000
Silver: Cr. 84,000
Bronze: Cr. 65,000
Trial Mountain
Gold: Cr. 124,000
Silver: Cr. 80,000
Bronze: Cr. 62,000
Apricot Hill Raceway
Gold: Cr. 121,000
Silver: Cr. 79,000
Bronze: Cr. 61,000
Fuji Speedway F
Gold: Cr. 129,000
Silver: Cr. 84,000
Bronze: Cr. 65,000
Nürburgring GP/F
Gold: Cr. 138,000
Silver: Cr. 90,000
Bronze: Cr. 69,000
Info from @eSZee & @ryandtw
Sebastian Vettel X Challenge
Races: 3
Laps

?
Championship Bonus: Cr. ???,???
Gift: Gran Turismo Red Bull x2014 Fan Car
Autodromo Nazionale Monza
Gold: Cr. 530,000
Silver: Cr. 290,000
Bronze: Cr. 180,000
Circuit de Spa-Francorchamps
Gold: Cr. 550,000
Silver: Cr. 310,000
Bronze: Cr. 190,000
Suzuka Circuit
Gold: Cr. 580,000
Silver: Cr. 320,000
Bronze: Cr. 200,000
Info from @ryandtw
Official Press Release
@Foxiol
http://www.gran-turismo.com/us/news/00_4448304.html
An update for Gran Turismo 6 has been released. The following is a list of the main features introduced:
Red Bull X Challenge - 2nd Part
The 2nd half of the "Red Bull X Challenge" has been added to the Career Mode. In these new challenges, learn how to drive an authentic Formula car directly from the world champion, Sebastian Vettel.
*Please note that the International B License is required to enter this challenge. With this update, the "Gran Turismo Red Bull X2014 Standard" and "Gran Turismo Red Bull X2014 Fan Car" have been added to the Dealership in-game.
Release of the Mercedes-Benz AMG Vision Gran Turismo Racing Series
An alternative version of the "Mercedes-Benz AMG Vision Gran Turismo", released on December 2013 as the first Vision Gran Turismo car, is now available. It is possible to obtain the car by participating in the new Seasonal Event, available only for a limited time.
Release of the Corvette Stingray Gran Turismo Concept
The "Corvette Stingray Gran Turismo Concept", a car displayed at the 2013 SEMA show as a part of the collaboration between the Corvette development team and Gran Turismo, is now available in the Dealership in-game. It is also possible to obtain the car by participating in the new Seasonal Event, available only for a limited time.
Birthday Login Bonus
An in-game car from a year near your year of birth will be sent as a gift when you log in to PSN. The gift car will be distributed within 1 week from your birthday.
*The information is taken from the player's SEN account used.
Remove Ghost Replay feature added
A Remove Ghost Replay button has been added to the Arcade Mode Time Trial and Free Run Quick Menu. You can display this feature by scrolling the right of the menu. This will allow you to remove ghost data that includes unintentional shortcuts.
Prize Information added to Seasonal Events
It is now possible to see what prizes are awarded in the Seasonal Events. This information is displayed on the right side of the Seasonal Events entry screen.
Things that have not changed(yet.......)
No Shuffle
Tire/Pit stop "BUG" (My personal opinion is that this is an attempt at scrub/sticker tires)
No Course Maker
Red Bull JR Online Restriction
No Community Features/Private Lounge
Seasonals
Chevrolet Corvette Stingray GT Concept Super Lap
Car: Corvette Stingray Gran Turismo Concept '13
Track: Daytona Road Course
Rankings Registration Period: Jan 28 - Feb 11
Event Available Period: Jan 28 - Feb 25
Prize: G=70,000 S=45,000 B=25,000
Gift: GT Military 001-C
Target Time: G=2:02 S=2:06 B=2:13
Mercedes-Benz AMG VGT Racing Series Super Lap
Car: Mercedes-Benz AMG Vision Gran Turismo Racing Series
Track: Daytona Road Course
Rankings Registration Period: Jan 28 - Feb 11
Event Available Period: Jan 28 - Feb 25
Prize: G=80,000 S=40,000 B=20,000
Gift: GT Military 005-W
Target Time: G=2:07 S=2:10 B=2:18