Epcot vs MK and FPP

Going at the end of September for a short trip. Will be hitting EP and MK on same day. Crowd level is a 2. Do I use FPP for Epcot or MK? Planning on being at EP at RD.

I recommend using FPP on the second park- MK.

@Lentesta @len kinda touched upon this earlier. Check it out.