The couch is great , if you going to add the armless chair to the couch to make it larger ,do not buy ..
The chair it self fits fine , the cushions are noticeably larger and softer , at least 2 inches higher and longer , with a little bit of pulling and tugging you can make it look presentable to stage . Once sat on and used they go back to original form of looking larger than others..
Also the chair cushions are ver soft and compress easy , the couch cushions are really firm and almost do not compress at all ..
Both questions are very comfortable .however If you have half a cheek on one cushion and have half a cheek on the other cushion, you are sitting on a thirty degree angle sideways not comfortable at all the back rest  also have same problem..
Also the chair cushions are lighter than the couch cushions. 
Definitely made in a different factory