Octavia alternator MY18 to MY19

Hi.

Stay with the “kangaroo” problem after the firmware, I decided to do something myself.

The car is just awful.

In this regard, I have a few questions.

1. What is the difference between an alternator in a MY18 car and a MY19 car? 

2. How to find out the exact model of the alternator installed in Octavia MY19?

3. Is it possible to replace without problems the alternator or after that car should be have another ECU?

4. Is it possible to replace ECU in a MY18 car to ECU from MY19 car without problems after?

(f.e. My 05E906018BH to 05E906018AL) 

Thanks