With Dyson, the different models basically just refer to the included accessories. Think of them as packages, rather than models. The machine itself is always the same between the various models in that line (but could be different colors). The V15 and V15 Absolute are both the exact same machine. Only difference is the color, filter, and included accessories. The V15 Absolute has: Gold machine / gold wand / gold brush bar A blue HEPA filter based on EU standards - filters down to 0.1 microns Quick-clean wand 4 accessories The V15 has: Yellow machine / nickel wand / nickel brush bar A purple HEPA filter based on US standards - filters down to 0.3 microns. (Dyson doesn't advertise it as HEPA anymore since it's no longer considered HEPA in the EU.) 5 accessories The "First Generation" you seen is simply just referring to the original Absolute "package". It has the older fluffy head, but has a lot more accessories (9 accessories). The machine itself is the exact same as these...there are no different generations with the V15 machine. The first generation Absolute model/package can be found here, but is not on sale anymore: https://www.dyson.com/vacuum-cleaners/cordless/v15/detect/absolute-gold Also, the V15 line is no longer the latest model. That would be the new Gen5detect line.

Hi there Darcy, this is Tia from Dyson! The Dyson V15 Detect+ comes with the same tools as the core V15 Detect, plus the Combination Crevice tool, Reach Under tool, along with a HEPA filter that can capture 0.2 microns smaller than our standard filtration, including particles such as pet dander and diesel soot. The V15 Detect + also includes our Low-reach adapter, which bends to comfortably reach down low under furniture as well as our Combi-crevice tool, which are two tools in one – narrow nozzle and brush, for quick switching between cleaning and dusting tasks. We truly appreciate your interest in Dyson's cordless technology! Best wishes, Tia Dyson Customer Support