Hi,

You can compare the values in both fields easily bu iterating the one2many field move_raw_ids over a for loop and if any mismatch happen, you can perform your operation.

Sample:

for line in self.move_raw_ids:

    if line.field_1 != line.field_2:

        #do your operation

You can reduce above lines using any operator in python.

If you are new to odoo development, have a look at this.

Odoo 14 Development: 

Thanks