Ipod touch 6 screen doesn't have the same front camera emplacement...so we can't say that's identical but screen work.. that's just not the same bezel. After my test i can say ipod touch 5 is not compatible with "original" ipod touch 6 screen (not same camera bezel as the 5th) But ipod touch 5 screen is compatible with ipod touch 6 !
I have the same problem and i did not find a new 4 pole cable with 5 wire. I solder a new 4 pole cable with 4 wire. It work but mic doesnt work....if anyone can find a 5 wire cable on ebay for exemple !!!