[fuzzy_patters]

Part of the difference might be the the first pitcher has amazing control. Pitchers in the game, as in real life, are more effective when they are ahead in the count. The other thing to consider is that Markus posted at one point that the game does consider pitch types to determine effectiveness against different types of hitters. The first pitcher has a lot of pitches that are effective against opposite handed hitters (changeup, cutter, screwball), which is going to take a way a lot of platoon advantages against him.