Unhappy [Q] [MTK Tool] Flash Backup from other Device without Brick?

Hi,
I bought a Alcatel Onetouch T'POP 4010D Phone.
Because the internal Space is so small, I wanted to use Apps2ext, and the simplest way seemed to flash a rom.
So I rooted the phone, installed cwm and installed Xperia Z rom.
Sadly, I flashed a wrong rom, so my phone now only detects one SIM.
I made a Backup with CWM, but this doesn't seem to be enough. I can restore, but I still have the wrong ROM!

I have another Phone, totally unmodified! How can I read the Stock ROM of my second phone, restore it to the first and have it working.
I don't accidentally want to flash config settings that are phone specific (e.g. IMEIs).
I guess MTK Tool is the way to go?
Can you please tell me, what exactly I have to restore to get the Stock rom on my second phone but don't brick it?