2nd one has a very stupid plot twist, no even stupider, To spoil the twist: the game lets you think that you play as the male detective six years in the past and the girl detective in the present, but really the timelines are mixed, so you play as the male and girl detectives in both the past and present. To do this the girl has to have an older clone, another character is an immortal 12 year old boy, they make Date (first game's protagonist) vanish for six more years with amnesia again, the murderer you spend the whole game looking for is already dead, and more.
If this wasn't so bad, the game doesn't explain the twist to the player naturally like the first Somnium game, it literally pulls the player aside and has a tranny character explain what is going on directly to the player, and glosses over some of the more egregious bullshit.