Comparison module logic

Seems the logic missed up in main comparison module. Why is possible to compare goods from different categories, for example such as refrigerators with a washing machine ... Comparisons should be based on categories at least. At present, comparisons can be placed for example refrigerator and washing machine. Why to compare that's different products by usage? I think this module should be rewritten from the basics, paying attention to the logic of comparison.

Daniel is working on Product Variant with the product options for a future release. May be this will shed some lights via the categories as well, we'll see once officially released.