NO NO NO! Get the big one. You save pile of money (~$300) and it's way better. With the pro, you get two batteries, a backpack and the real sense which is awesome for all aspects of flying. Especially things like Curved Cable Cam and so forth as it remembers where things are. So even if the sensors don't detect an obstacle, it remembers it is there. If you buy these separately you're gonna pay $580.00 for the RS module, $99.00 for the battery and $99.00 for the case.
The pro is not disappearing, there is a newer quieter one, the "Typhoon H Plus", with the new real sense firmware update. The new drone is 40% quieter if you care (I couldn't care less about noise) and it has the 20mp 1" sensor E90 Camera and they are supposed to launch in June of 2018.
Heres an explanation of Real Sense: