Lasalle,
These guys are quite right - in theory AOR is a simpler game, at least until you want to charge into contact. We landed up making a flowchart, to help us figure out what to do next.
While charging in DKK is a little more straightforward, its also the area of any horse and musket rules where things bog down, or situations arise which the rules writers didn't cater for.
Apart from that the big difference is at the command level. You really have to plan your battle with DKK, and can't react to events nearly as quickly as you can with AOR. As I mainly play with Russians and French, I usually have real command problems, so it pays to make a plan and stick to it.
Finally, while AOR has one-size fits all units, DKK is based on hisotric sizes, so units can vary from 12-24 figures on the tabletop. the miniatures are also based two deep, which to my mind looks a lot better, but of course this is a personal thing.
The secret is, try 'em both out, and see which set you prefer!
Best Wishes,
Angus Konstam
www.edinburghwargames.com