I can give you a general answer only due the lack of details. Both datasets will be created from one and the same source-file, so ideally both should return the same result but the interpretation is different from addon-developer to addon-developer. Some are nearer the reality, some not. The data and the correct interpretation needs more than a good developer, you must understand the rules, the concept and you need of course knowledge about the content. Also here, someone has this, someone has this not in the same quality.
Therefore, the source is the same, so it should be the same result … should be, but that means not always.