Different Keil Versions produce different .Hex files for the same code. Keil-4 Vs Keil-5??

Will the .hex files be different if there is any change in the Keil version.
Different Keil Versions produce different .Hex files for the same code. Keil-4 Vs Keil-5??

Will the .hex files be different if there is any change in the Keil version.
keil 2 and keil 4 compatibility

I am not able to download the hex file generated using keil 4 to mcs51 but i am able to download keil 2 hex file to the same processor. Can anyone please help me out.
Keil v4 project in Keil v5

Hello I am trying to build a project built in Keil uVision4 in Keil uVision5. But this error is preventing me to do so. .\obj\..\hex\DG_ETH_1_7.axf: error: L6050U: The code size of this image...
Keil v4 project in Keil v5

Hello I am trying to build a project built in Keil uVision4 in Keil uVision5. But this error is preventing me to do so. .\obj\..\hex\DG_ETH_1_7.axf: error: L6050U: The code size of this image...