does EA give you a better chance of getting in?
At some schools, yes. And some schools require EA to be eligible for merit $ and honors college.
In general early action doesn’t provide the same type of admissions bump as.early decision since it is not binding.
Schools do tend to think that EA applicants are more interested, and didn’t just add their college to the list at the last minute. So they might be slightly more inclined to admit you vs someone with the same qualifications in the RD pool, since the odds are probably a little higher that you’d accept an offer if admission.