Some info on me; I'm 6'3", 175lbs, right handed and have the flexability of Adam Scott, wish I had his build. I don't think there is supposed to be a difference but there is for me.

When I swing my 7i I;
-feel like I pull the club back on line
-my hands feel like they actually cock the club to parrellel
-on the downswing, I feel like the club just falls into the slot and squares the club

When I swing my driver I;
-feel like I have to pull(while rotating my shoulders) the club to the inside so I can avoid an out to in swing
-to get the driver to parrellel I have to get my left shoulder under my chin and have my hands stop at what feels like 3/4 but is acutally parrellel
-at the top of my swing it feels like my driver is sitting 7-9 inches directly above my right shoulder
-I also feel like the club just drops on the downswing in the slot but I fell like I have to really extend to the outside for an in to out path but it is actually square
-I also try to feel like my right heel has remain in contact or very close to the ground until the moment of impact

When I swing my 3 wood I;
-almost everything the same as a 7i but I feel like I have to stop at 3/4 for the club to actually be parrellel
-don't have to force the club on and inside to out path

On bad days I have a tendency to come over the top and not let the club just drop in the slot. Other days I have problems with my hands when they collapse close to my side and my hands end up way in front of the club face and ball resulting in a wicked out to in swing and a nasty 40 yard slice.