Surely the issue is about equivalent products, I don't see how that fits in with gadgets.
But as I pointed out previously there are very few actually gender specific products, although there are many that are specifically marketed at men or women.
So I can buy shampoo - all shampoo will wash hair, but some are marketed specifically at one gender or the other. I think manufacturers probably think that they can attract a premium price for a product marketed at women on the basis that they are prepared to pay more, while most blokes aren't interested in the marketing and just want something that washes their hair (I understand the marketing drive toward men is changing, but this is for the sake of argument).
But the reverse is true with other products. So, for example TVs - I have little doubt that much of the 3-D 4K definition, curved screen, with super motion control, automatic contrast adjustment etc etc marketing is largely aimed at men who love the notion of having the latest gizmo with all the latest features (most of which they will probably never use) - so men are likely to be susceptible to the marketing gimmicks and pay a premium when many women would be content with a product that simply works (just as in shampoo the other way around).