safety issues
I will refrain from getting involved in tiresome comparisons between aircraft types, except to say that both the 902 and the EC135 are modern 2nd generation aircraft and are much safer to be in, if today is the day that your number comes up!
Just add up the total numbers of accidents for both types, realise that both are generally engaged in front line emergency service operational flying, and then ask yourself if the number of fatalities might not have been far far higher in older designs?
Tigerfish