Soul Suspect is the most innovative of the three games, the gameplay is quite unique.
If you want something that stands out from your other games this is most likely it.
It also has a strong emphasis on storytelling.
If you liked games like LA Noire and Alan Wake you might like this one because it feels like a mix of those two.
I have a number of sniper and stealth games already, but nothing similar to Soul Suspect.

Edit note: did not see that last comment by the OP.