1) what type of person are you financially. If you're risk-averse, stocks are preferable since they let you convert into different investment vehicles earlier, whereas if you're risk-tolerant RSUs and options are a bigger gamble - the latter much more so
2) having talked to the teams, which one seems most interesting
I wouldn't worry too much about gossip/social cachet. Speaking as someone who does technical interviews at one of the companies you mentioned, I can say that for engineering positions, interviewers at future employers will only really be interested in whether you can do good engineering work.