I would say that in general the bleachers are tamer on Sunday's, but there is considerable variation depending on where exactly you sit. Example: Last year for the KC series we were in RF bleachers on Saturday Night and LF Sunday Afternoon. On Saturday the fans were pretty knowledgable and into the game, despite the imbibing. Sunday, however, we baked in the sun for 4 hours and ended up watching Spurling (or was it Crapellan...) walk in the winning run with the bases loaded in extras. Needlelss to say the fans were unhappy and a few fights almost broke out over defensive positioning, Ned's resemblance to a certain farm animal, etc. Not fun. Anyway, I guess Im just trying to explain that the difference between day / night, terrace / field is noticable, but not enormous.