Qt5 and Pattern for similar dialogs implementation

What is in your opinion the best way to implement similar dialogs in Qt5 without duplicating the code?

This is the problem: having two "slightly different" data structures, with many common parts, implement two "slightly different" QDialog to handle the user interaction.

We have two structures:

class DataA {
public:
  int one, two, three;
  bool x,y;
  SubdataA subA;
}

class DataB {
public:
  int one, two, three;
  bool x,y;
  SubdataB subB;
}

SubdataX is some other structured data we need to handle in the GUI. The two QDialog should handle the common fields the same way, while SubdataX must be handled by specific parts. The code should also make some operation on the data structures, and provide output files. This part is quite easy.

My question is, what are the best strategies to implement this? The objective is to have elegant code that should be quite easy to maintain and as most readable as possible. The framework is Qt, so the solution should be tailored to Qt with qdialog layout in UI files, since the gui layout is too complex to design it by code.

Thank you.