Seniortrooper -depends on how many crew you have on board. One on the stretcher and two walking wounded unless you have an extra crewman / doctor / medical observer / cameraperson etc etc.
PANEWS - the 135 is a fine machine no doubt. Just happens to be second best, no shame in that, surely.
Bottom line is - if the beancounters choose your HEMS machine, you'll get an EC135. Put the pilots in charge, and the future at MD would be very rosy indeed.
109 outselling the 902...I would hope it has outsold the 902, given that it's been around since the year dot. However, how many fingers do you need to count the number of 109s flying HEMS/ Police in the UK?
Let's just say that if you have any soul, you'd want to leave the school dance with the 902. You'd still be happy enough to take the 135 home, but you wouldn't want your friends to see you with her...