Nigd3
I do know that significant sim type testing using instantly displayed UA's and then measuring response time to correct, degree of control movement and also correct control movement to recover the aircraft, came down quite heavily in favour of the Russioan O-I ADI. The O-I gave a faster response for recovery and also fewer erroneous corrections.
I find your comments related to testing that has demonstrated a pilot preference for the Russian O-I ADI very interesting. Is there a published report you might be able to direct me towards; perhaps something online at Royal Aeronautical Society and/or Society of Experimental Test Pilot?