The TP9SA is a SAO with a decocker. Some people hate that aspect of it, I love mine. It uses cz75 sights.
The TP9V2 is the same gun but with a unique DA/SA trigger.
The TP9SF is the same as a TP9SA but without the decocker. It also has a difference sight configuration. It uses a Glock 43 rear and M&P front sight. This model was spec'd by Turkish special forces according to century arms.
I love mine, it's a great pistol.