The Losmandy site says the StarLapse controller can be upgraded to the standard GM-8 controller (probably for the dual axis configuration) or even Gemini-2 if you want to replace the motors as well. Does the StarLapse controller have a lot of unique features you may not want to lose if you decide to upgrade controllers?
You can convert the starlapse back and forth between a cam tracker and a regular astrophotography type mount in a few leisure minutes, I am not sure if you can switch the unit to a "Gemini" system,, I wouldn't be quick as new motors and drive system are a bit different and have to be installed in daylight and it would not be quick.
The starlapse's hand control offers sidereal, and solar speed + 6 other speeds marked as 30, 60,,, up to 240 to slew the camera, which the numbers base the speed of the natural earth turning/sun moving across the sky at 15 (degrees per hour). so the 30 button turns your camera twice as fast as the earth turns or 2x,, and the buttons pretty much equal what many mounts already do by offering the 2x, 4x, 8x, 16x 32x, 64x. Scott just laid it out different for what the starlapse is intended to do "starlapses" or "panning" and a combo of both.
one other note, if you hold the start button for 3 seconds, all 6 speeds are reduced to 1/10 their normal speed.
So to answer your question,, each configuration has its own uses and you never "lose" anything as you can switch from one configuration to the other in minutes,,,