1) Rather close within the limitations of Renpy. The core game concept of "press for info, find contradiction over evidence" is pretty much directly taken from Phoenix Wright. Depending on which game, you have some more options when analysing evidence, or to explore the world and gather evidence before the trials happen. Haven't played all Wright games, but a lot and I enjoyed most of them.
2) Probably not super binding. The affection bonus can be gathered otherwise over repeating events probably and the harem option might not be binding, since so many players missed it or wouldn't want the most important decision to be hidden in an "analyse evidence" submenu.