The applicants are the same. But with REA - you would be moved to RD. They reject few. If you get moved and want to apply ED2 elsewhere, you can. You will have tried.
Harvard says this:
Is it easier to be accepted if I apply Restrictive Early Action? Harvard does not offer an advantage to students who apply early . While admit rates tend to be higher in Restrictive Early Action, this reflects the remarkable strength of the applicant pool rather than a benefit of application timing.
Don’t panic. Put your best foot forward. If you don’t get in, no biggy. Few do. It’s why you have safeties.
Ps on ECs - which is your regular, do it all the time. I see the two year food program but it sounds like on occasion.
Are you on a sports team or have a part time job, etc ?
I see quantity and quality but maybe not regularity. You may have it. Make sure it comes out.