Where will I learn more? Jsip is much shorter and not a real internship. If it was the actual internship I would obviously pick it.
Imo real internships > jsip >= meta university program.
Its the normal swe internship at meta, not metaU
IMHO, the regular internship is better. You can do regular JS internship next year.
Since the jane street is not a real internship, see if you can do both. I know someone who did both a samsung and another internship right after another.
You'd probably learn more at Meta because it will be more like real work. I think people who benefit the most from JSIP are the people who currently can't get a FANG internship, but you clearly can. This is also something you can discuss directly with Jane Street and hear their thoughts.
What do people actually do at JSIP?
Our website describes it. It's smaller in scope than an internship. Most people in it probably would have trouble landing a Meta internship offer.