Part Quality?

[mjperk]

I've been looking at getting a few mods for my Hyundai, but have little experience with the products coming from places like sharkracing, koreanautoimports, importshark, etc. My first question is regarding the body styling stuff they sell such as spoilers. They just use 3M tape to stick on, but say they are painted to color match the car. Are they good quality? Do they stay on well? Does the paint chip easily?

What got me questioning their quality is that I noticed that some of the parts, such as spoilers, is that they can found on Ebay and appear to be the exact same product that these vendors are selling. Non of them, vendor or Ebay, have brand names many of the times either. On Ebay, it says they are shipped from Korea, so I'm not sure if these are just the marketplaces for the stores I mentioned, or are cheaper knock-offs.

The links here show you what I mean:
Vendor
Ebay version

Are these the exact same? I've always been a little wary about buying car stuff from Ebay and want to make sure that the products are good quality. Does anyone have experience with them?