hi europun. having interviewed at both places, i'll try to as helpful as i can (although the details are a little bit cloudy as it's been a while). from what i can remember, the interviews for both schools are relatively short (about half an hour or so). they were both 'get to know you' type interviews, not really stressful. however, during my drexel interview, i was presented with a clinical scenario and asked how i would handle it.
definitely be nice to your student interviewer at drexel and keep in touch with that person b/c your student interviewer could talk to lisa cifelli (director of admissions) on your behalf. hope this was somewhat helpful. feel free to PM me if you have any other questions. good luck!