All this talk of what happens when two pilots make different inputs on the sidesticks (and whether either is aware of what the other is doing) reminds me of AF447
+1
When an Airbus co-pilot, who would use his/her right hand to control the plane, gets promoted to captain, is it difficult to get used to using their left hand to fly the plane? I've often wondered.
As Aerocat said, no - no difference between column and stick. However, there is an adjustment period where the pilot (regardless of control style) has to "learn to fly" from the opposite seat. It's not too bad the second or third time as you know what you're in for, but it can throw some guys for a bit of a loop. Eventually though, you get used to it and for us training guys flying from both seats becomes par for the course.