You can identify the e-on made plants at Cornucopia3D by looking at the top of the description. If there is a broker name it is a modification of another plant, if there isn't one it is from e-on.

But you should make a basic decision for yourself first. If you use an e-on "base" plant from Cornucopia3D it means that people buying your package HAVE to have the base plant too. Which means that the price for your package is a lot higher than only the price you defined. It as well means your package is copy-protected automatically (because the base is), something some do not want!

The trick is to find a plant that suits your needs under the ones that come with Vue when people buy it. Then you are on the save side. It of course means a lot of testing to find one that, with the right modifications, suits for yo. I think exactly there lies quite some know-how of good plant creators for Vue. The knowledge what can be done with what plant.

One day your ship comes in - but you're at the airport.