I'd worry more about the quality of the speaker....or the SWMBO factor.
In the lounge the 'rear' speakers will be more or less exactly where your guide link shows. In the bedroom almost to the side of the head end but if we are sitting-up in bed watching TV, the relative positions of the speakers to our heads will also be almost similar.
As for the quality of the speakers, the Samsung package comes with them; with the Sony, they are not standard but dedicated to that particular soundbar. SWMBO is a Sony fan and every piece of kit we are buying for the Master Bedroom, including the wireless headphones, is a Sony. I am even considering having "SONY" tattooed somewhere on me so that I can win concessions during arguments. Anyway, she's paying for the Master Bedroom setup.
On the flipside, the lounge setup is my domain, as will be the 'listening room' in the converted loft room where I plan to install the Marantz CD6006 with Onkyo Stereo speakers and also place my turntable and vinyl collection there.