If somebody asks what are the differences between two editions of the same application, how should the question be tagged? For example Difference between resin and resin pro is currently untagged and I have no idea what would be the proper tag, despite the question looking to me like it's on-topic.
That question is now gone. As @Doktoro Reichard says, we actually discourage questions that ask for a general comparison between X and Y. Mostly because you could look up the differences yourself, and we'd found that those would also elicit opinion-based answers as well.
That being said, I could imagine a question asking how to solve a specific problem you have with regard to different versions of an application, e.g. how to achieve something in a non-pro version, or asking about upgrade paths, et cetera.
Remember that tags are primarily meant for users who have a certain interest or expertise in a topic to find questions they can answer—but could there be an expert in software-comparison? I highly doubt so.