It doesn't make much difference since those KFs are already just in one Cube. When you try to run your report, the KFs will obviously fetch from the Cube only, it won't search in other cubes while retrieving data.
0Infoprov will help in cases if you have year wise cubes and many other cubes. The OLAP engine goes to the respective cube and fetch the data. But still it will lookup all the infoproviders till it gets the right cube.
For complete understanding : http://scn.sap.com/docs/DOC-16126
You can try in RSRT-->Query-->Mutliprovider Explain