It sort of feels like the carenado one is a mix match of different serial numbers while the Simworks one is modeled after a specific PC-12.
The Simworks model is more likely to change and I follow the forum and, as a RW single Pilot PC-12 operator, I find myself disagreeing with their performance numbers and changes more than I find myself agreeing. That being said they are making changes in an attempt to better the plane so there won’t be any complaining.
Simworks is overall the better model. It is more complete and better supported by a better developer. For the price difference, if you are only going to get one, I would get the simworks. It might be worth waiting for the Simworks one to hit the marketplace before purchasing just to make updates easier.
That being said, the Carenado one is fine for sim use. It mostly functions like it should and paired with a TDS 750 you can get good basic operational practice with it. But Carenado is known for not updating their airplanes and lack of support and bugs will always be there.