They're not the same thing
I won't bore you with the details, but the devil is in the detail with the puddle lights; many of the cheaper ones you see on eBay, Amazon and elsewhere use a cheap projection film that will fade within a year, this is especially true of any that project color, since they're basically ink-jet printed. We use a higher spec film and a specialized ink with heat-resistant plasticizers, which together cost about 25x the price, but of course since it's a tiny component, it's not too significant at the per-bulb level, the main impact is that it significantly narrows our production options. The nature of the form-factor also means that significant heat is generated quickly (these have to use a single, high-power SMD (LED), vs. multiple smaller (and therefore cooler SMDs); we have a 90 second timer to protect from too much heat (which will lessen the life of the projection film).
I guess I did bore you with the details

As a general rule, whether you're buy 1 thing as a consumer, or 10,000 things as a business, you pay for what you get, but very often just a small increase in spend leads to a disproportionate increase in the quality of the product. The problem is the focus and mindset is nearly always on getting something as cheap as possible.