Emirates Airlines Skywards - EK Miles - Best program to Post

I'm planning to take a US-India Trip in the next few days in EK in M Class booking. The Total Miles will be around 20K. I currently do not have a Emirates FF Program. Have a Jet Airways & United FF Program and have some miles in both.

Should I sign up for Skywards and earn the miles or post them to United's Milage Plus?

If I post in United - will I get 100% Accrual from EK Flights?

well it depends if you fly emirates a lot then it makes sense to get the FF. You already get 20k and another 5K this year will get you to silver card program.

I do not fly emirates that often and posting the miles to Millage Plus means I can get RDMs and convert to a award ticket. I have got the Miles posted in United MP in a week after the flight and will add some more to get an award ticket.