Hi ATC hopeful
just to add to paperclips comments, if HR have told you the interview for S3 is the same as it was then you will more than likely be asked technical questions.
It varies a lot from interview to interview, but i would advise trying to do a couple of visits because it took up a lot of the time in my interview (which lasted just under 2 hours). when you do your visits make sure you pay attention to everything you see, i was asked what the roles were of people i had spoke to and any phrases i remembered being used.
PM with any Q's. good luck.
shugs