Jas,
1. No idea. It'll be the same tests anyway so don't worry about it.
2. My biggest shock was blowing into the spyg....sprygh...ometer, heck the machine to measure lung capacity, and hearing the wheezing noise echoing round the room. Still, I passed so I must have been on less than 20 Bensons a day back then......!
PS Congrats on getting through selection, subject your medical (shouldn't be a problem) then welcome to a fantastic career!
[Career; verb, to plummet downhill out of control]