I've poured over a lot of photos and the rosters at utahrails.net, but wondered if anyone can confirm this...
The Kato AC4400CW "9997" and the ex-CNW OLS unit share a carbody that is unique to only the ex-CNW AC4400's - and the three original UP AC4400's (9997-9999, which became 6700-6702). In other words there are plainly visible differences between these units and the rest of the straight AC4400 fleet.
Thanks,
Lou