There is a standard Amazon on-site and a "hiring event" on-site. According to recruiter, the hiring event is 4 hiring managers and they will give you an answer within a couple of days. The regular onsite is 6 interviewers (non hiring managers?) and it can take time to get an offer/rejection.
Which is more beneficial to the person interviewing. It sounds like the hiring event is better, but just double checking for any gotchas.
Secondly, how is the system design interview? I'm from a different industry (finance) and I don't know much about the consumer/internet world. If I take a few days to study system by design would that be enough? My leetcode numbers are pretty low and I'd like to spend all my time on leetcode if I can. Or is system design a lot more important than other rounds?
Normal onsite for L5-L6 is 5 interviewers
Since part of the interview is interviewing the team or manager, the normal onsite has a more personal touch. Hiring events you won’t really know where you go until later