Both the Neutrik and rean 3.5mm plugs are the exact quality as they are the same plug, just different logo. You will find that many places you order Neutrik from will also send you the rean instead.
Only place you will see different quality is when the exact same connector is not sold in both the Neutrik and Rean brands, so how do you compare one against the other. When you find the same product under both brands, you will find them to be the same, they are just sold under 2 different brands.
Even on the rean site, you will find that the actual product pictures show the Neutrik branded plugs, http://www.rean-connectors.com/en/products/35-mm-plugs/
Some of the products that are now being sold with both Neutrik and Rean brands, will soon only be available in the Rean brand, including the 3.5mm plugs, that's my understanding from speaking directly with Neutrik UK some time ago.
Anyhow, this is the picture gallery.