Having the privilege of flying both the EC135 and MD902 in the Police role they both have their strong points and, as always, we could make a perfect Police machine by blending the two together.
Plus points of the MD902, compared with the EC135, IMOH:
Engine handling and EECs (FADECs), although why PAS had to put the wiper switch where it interferes with #2 manual throttle, I don't know.
Cockpit headroom and visibility (no overhead console) - for lanky people like me
Built in test and recording equipment - IIDS (CDS in 135)
Low vibration
Comprehensive autopilot but beware SAS dropping out on manoeuvring
Negative points:
Heading control - fenestron giving 50 kts sideways and backwards in 135 is MUCH more precise
Rear cabin space and visibility
Seating - OK once you're in but small door and diagonal seat brace make it impossible to look punchy getting in or out!
Intercom/radios on the machine I fly - difficult to achieve a good balance between i/c, ATC and tactical radios
Access for daily checks
It's a shame that both aircraft have been plagued by the rumour mill as they both do the job extremely well and, as has been pointed out, they are both immature aircraft which are getting better all the time.
Just a brief thumbnail - if anybody wants anymore, let me know!