Differenze display iMac 27 Late 2009 vs Late 2011

[Milites2002]

Salve, vorrei sapere se a livello tecnico entrambe le produzioni 2009 e 2011 usano gli stessi pannelli retroilluminati a led.

Dalle specifiche Apple risultano entrambi:

Display a retroilluminazione LED da 27" con risoluzione di 2560x1440 pixel


Il cambiamento da 2009 al 2011 fu solo dedicato all'hardware interno?
Grazie

[faxus]

iMac late 2009 27"

Built-in Display 27-inch (viewable) LED-backlit glossy widescreen TFT LCD with IPS
Brightness 375 cd/m2
Resolutions 2560 by 1440 pixels

Graphics Card ATI Radeon HD 4670 or Radeon HD 4850
Graphics Memory 256 MB (Radeon HD 4670) or 512 MB (Radeon HD 4850) GDDR3
Display Connection 1 - Mini DisplayPort
Display Modes Dual display extended, video mirroring, Target Display
External Resolution Up to 2560 by 1600 pixels
Camera Built-in iSight

iMac mid 2011 27" (late non esiste)

Built-in Display 27-inch (viewable) LED-backlit glossy widescreen TFT LCD
Resolutions 2560 by 1440 pixels

Graphics Card AMD Radeon HD 6770M or Radeon HD 6970M
Graphics Memory 512 MB GDDR5 (Radeon HD 6770M) 1 or 2 GB GDDR5 (Radeon HD 6970M)
Display Connection Thunderbolt digital video output (Support for up to two Thunderbolt displays)
Display Modes Dual display extended, video mirroring, AirPlay Mirroring, and Target Display
External Resolution Up to 2560 by 1600 pixels
Camera Built-in FaceTime HD

[fragrua]

Di sicuro il connettore è diverso.