Daiwa do have a bad habit of using certain names repeatedly, which tends to confuse. However, as yet, I've never seen a product code reused. One big problem is that anglers tend to use single parts of much longer, more convoluted, full names. There have been loads of Daiwa Connoisseurs over the years. Similar story with Powermesh rods. There are definitely three distinct ranges, perhaps four. The original was just a Powermesh (Carp, Specialist and Pike), the next was Powermesh X. The one I'm not entirely sure of was whether the Powermesh XS was a distinct range or just an addition to the Powermesh X range. In the last few years, Daiwa brought the Powermesh name out of retirement. They use it on more distinct types of rod than ever before in this incarnation.