The important thing to distinguish between the Multistruder and other extruders is the "MOS" Multistruder Operating system that allows you to quickly get to your target diameter size and dimensional accuracy.
If you don't have the "MOS" on other extruders you will need to have a piece of paper and pencil to track all the calibration steps. You would need to write down your starting temp, extrusion speed, and cooling fan speed. Then extrude, if you are under/over size you change 1 of the 3 variables and keep the other 2 constant, write down what you changed, then extrude again. You then check how the diameter changed and then write a equation on how much you changed that variable compared to how much the diameter changed. Then you keep calibrating those variables (while keeping in mind that you want to maximize extrusion speed and minimize heater usage) tell you get it right.
"MOS" does this automatically using algorithms that i write from me spending the time doing the process above. so all you have to do using the Multistruder and the "MOS" system is enter the extrusion temp, start the extrusion answer some questions on screen (coarse calibration), then go to precise calibration were you just tell it your current filament diameter and what diameter you want, it will then get your current diameter to your target diameter. It will basically do the Manual process above but all you have to do is tell it your current filament diameter and it will change stuff for you. And if you were to add the expansion modules this would be done automatically without you even needing to tell it the filament diameter.
The system will then save that preset and resin type so you can change types of plastic or change manufactures of resin (ex: pla to abs) extrude the new type of plastic and then switch back to that previous resin and it will have those presets saved so all you have to do is load that preset into system and just hit start. Without "MOS" you would have to go through your notebook and find those settings then enter those into the system.
More on this feature as it develops.