Android stereo update, need help, don't know what firmware I need

Hi everyone, I got a stereo from eBay last year and it's currently on 4.4.2 and it just looks out of date, wanted to update it to the stereo that was in the description on eBay, I believe that one is just more up to date, I have the info I got from my head unit, any help would be much appreciated.

Any direction where to get the right firmware would be greatly appreciated

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