The difference in numbers in this motor

I have a problem with an engine. I found another engine, but the red numbers are different from the other engine. Are these numbers important for the engine to start, or are they unnecessary?

 

Hi sir
the part number 43.112.1311/B is a suction drum motor used on Heidelberg offset presses, including the GTO52, GTO46, and MO models.
This motor powers the suction drum, which is essential for accurate sheet transport through the press.
When ordering this part, it is crucial to specify the "/B" suffix to ensure compatibility with your machine
good luck

 

This means that all the numbers must be the same as the old engine, or are there numbers that, if there is a difference, nothing happens?

 

Normally it must be the same , sometimes you can work with another reference of motor but not encoders