A standard coat is med length and lies fairly flat.A long coat has many different looks.It can be "plush" which would be more of a sensation when you pet them,soft and fluffy,and stands out a bit from the body.Sorry,no photos.
Plush is not a coat type, it's a descriptive term. Some people use it to describe a long coat that's on the shorter side, some people use it to describe a thicker stock coat, so it doesn't actually have a real meaning.
Both long coats and stock coats can vary in length and thickness. Both of my dogs are longcoats, but Keefer's fur is quite a bit longer than Halo's and silkier to the touch. Halo's is shorter, but very thick and soft - more of a plush feeling. But genetically, she's a longcoat.
To me the "plush" coated dog are long coats that have really thick, soft, fluffy coats. There are long coats that look/feel almost NO different than a stock coat except for the ear fringes and maybe some every-so-slightly longer belly hair, but then there are long coats that feel like they have pillows of hair. That's what I consider "plush". I don't know if I've met a plush stock coated GSD. I've met some WGSL stock coated dogs that had thicker undercoats but they just felt thicker, the coat didn't feel soft and "plush".