Why not discuss the failings of both, instead? Since this is audio-visual world, of course better graphics are paramount. But if all one does is transverse an endless number of identical dungeons, no matter how beautiful it is, one is likely to become bored after awhile. The question therefore has to be asked: what constitutes great graphics or great game-play? One would therefore have to compile a list of what constitutes bad graphics and bad game-play. To me, what brings it together is camera controll, whether one has any control over it or if the camera is a hinderance.
I say that it isn't just graphics or game-play, it's whether or not one has fun, whether the game keeps one enthralled, whether one has a sense of accomplishment after beating a game. Does the game have a buffo ending? When you beat a game, do you see all the credits like you would after seeing a great movie? Like a great movie which you want to keep to see over and over again, will you ever play the game again and again?
Don't tell me what you like, tell me what you hate.