This could be one big "adventure" for you. You'd be a hero if you made it work and posted all the things that had to be done to make it work. I doubt it will be as easy as a removal of your cluster, and a plug in of the new.
I went through this on my 2005 Ford F150. It was an STX model, and the cluster had all the guages (speedo, oil pressure, fuel, and water temp). I wanted a tach. So I bought a cluster from a FX model. The dome lights stopped working, the mileage had to be flashed to match the old readings (optional of course), the information center did not work ("door ajar", etc). To get all this to work, information of my truck would have to be flashed into the donor cluster by Ford (if you could find a dealer that had the very expensive equipment to do it), or a speedometer repair shop that also would need the expensive equipment to do it. The engine had all the sensors to provide the readings, but the ECU for a given model (STX verses FX in my case) was not programmed to send all the signals to the cluster, as the STX stock cluster did not have a tach, therefor the ECU did not need to send that signal.....I got it all to work, but it cost me $150.00 for the used cluster, and another $200.00 for the flash (mileage and ECU signal acceptance). Never did figure out why the dome lights stopped working until the flash as well. I could find no reason as to why that signal from opening a door would not turn them on (no outer door switch; it was on the inner door latch lever like the Mustang and all newer cars are now). Just one of the many possible quirks you may run into.
If it were me and I had to have it, I'd trade in for a model that already has it.
May not be the case with the newer Mustang, but I'd certainly do the research before laying down the cash to buy the newer cluster.
It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.