As rendering once JOHN was one of the best, now there are games that surpass it and SR is very similar when it comes to graphical quality. If on the other hand we're talking about the graphic design of the various FCs (Laura and Jessica), well I think that's entirely debatable and above all I think neimgs goes outside the usual starndards according to his fantasy and not the usual cliches that other games have.
In my opinion, they have 2 different ways as far as choices are concerned. JOHN being a Ren'Py VN, the game is ONLY based on choices and has nothing else for the player to do.
SR being born as an RPGM game and then in Ren'Py Sandbox, choices and are made differently, you are not forced to perform a scene or choice just don't perform it or not be there in the place, the game goes on anyway with other choices or other scenes in other places.