I've read in Flight International that Alitalia was considering getting 747-400's in part, because KLM flies them. In other words Alitalia wants more fleet commonality with KLM. Does fleet commonality matter in alliances? In my opinion it does not with regards to attracting passengers provided that planes are of similar quality, age, comfort, maintained, etc. However, there may be some benefits in reduced costs if the airlines share maintenece. What do you think?