Keep in mind that this installation was one of the last for the Razor version 3. Razor version 4 has more bells and whistles (and improvements)....installation is not an exact science as we ran into some unexpected costs as we removed the old IBA and learned about the requirements for the new IBA (electrical and water). Project was supposed to take 2 weeks and ended up taking 3-4 to get the machine optimized in terms of performance and chemical usage.
You should ask a WW rep for all the differences however my perception from the Nashville show is that ver 4 has newer/better onboard colored LED lights, a new faster special options applicator (I think it can apply triform or lava flow faster), the controller box in the equipment room uses newer (more robust in terms of programing) controller PLCs, and the pump stand was redesigned to be easier to service and has more controllable functions.what differences do you know of between versions 3 and 4?