It is trivial to simulate, just do it for yourself.
My results, from back when I did it, follow.
As presented, with Monty always opening a door with a goat that the contestant did not pick:
Switch − 2⁄3 Stick − 1⁄3
If Monty opens a random door that the contestant did not pick, with the contestant losing if the car is revealed:
Switch − 1⁄2 Stick − 1⁄2
It is trivial to simulate, just do it for yourself.
My results, from back when I did it, follow.
As presented, with Monty always opening a door with a goat that the contestant did not pick:
Switch − 2⁄3 Stick − 1⁄3
If Monty opens a random door that the contestant did not pick, with the contestant losing if the car is revealed:
Switch − 1⁄2 Stick − 1⁄2