A tour follows a movie track (be it your own or the default "Slideshow" movie track) whenever in Auto Play mode or when you click on the Play button. Whatever the rotation speed is of the movie track of the "scene" is how fast the scene will rotate.
Clicking a button, say a directional button will take you away from the movie track and onto the whatever the button is set at. Meaning it will obey the rotation speed of the button. Your directional buttons can have the same or different rotational speeds.
You have no control over the rotation speed of the "Play or Direction" buttons in fullscreen mode "if" you are using the Tourweaver default fullscreen control menu. You get whatever Easypano set this at.
Worth noting is that the timeline on a movie track will show in what is presumably "S" for seconds. My testings show this is not true and should be used only as a reference or guide. Relying on it for actual real life seconds will only disappoint. I.E: 40 seconds on the timeline is 24 seconds in real life on "this" computer I typing this on. 40s is default rotation speed of 10. A change of rotation speed to 2 adjusts the movie track of the scene to 200s and real life seconds to 122 seconds (again on this computer). It will change from computer to computer depending on CPU power.
You need to pay attention to what movie track you have assigned. You also should make sure that in the publish section of Tourweaver the same movie track is set for Autoplay.
I hope this gives you a better idea how and why you see different speeds.