ECU change- number different, but only last characters

[meteor80]

Hello.
I have problem with SEAT Cordoba 2001 1.4 MPI. I need to change ECU because old one is faulty, but I can't find the same one.
Old one is 6K0 906 032 AJ.
There is a lot of ECU's but the number is little bit different
6K0 906 032 C
or
6K0 906 032 AC

I would like to know what is the difference between them?
Can I buy one of them and solder 95040 from old one to the new one, or do I need to solder 29F400 too. Or is it completly different ecus and it will not work?
Thanks in advance for Your replay.

[Azzx]

If it's 1.4 16V get the 6K0 906 032 AC and solder 95040, should work then.

Az

[meteor80]

Hello.
This engine is 1.4 MPI 8V AKK.

[oldford]

I always check the redirection files in VCDS from Ross-Tech.
6K0 906 032 AC - AUD (6K)
6K0 906 032 AJ - AKK (6K)
6K0 906 032 C - AKK (6K)