Is that a trick question? The answer is "The newer one", because having the latest iPhone has become a social signifier. I bet you if Apple brings back the 3.5mm jack,airpods will be seen as tacky in record time.
Without, personally, as I think I'd have to be completely detached from reality and good taste to opt into wired earbuds.
...but I /do/ think the rest of y'all maniacs deserve a choice, too, even if it's utterly unhinged, so ceteris paribus I'd rather you be able to have a 3.5 than not :P