10am arrival is probably enough time to get plenty in without having to do After Hours. Assuming you want a full day including rope drop the following day, I would not do After Hours.
As to Epcot vs DHS, that's up to you and which you would prefer and what other parks you are planning on visiting the rest of the trip. Epcot has the best restaurants, if you are interested in dinner. Galaxy's Edge in DHS is cool at night.