The DVC30 does not have the same settings for scene files that the DVX100 does............You can get close but I don't think you will get the exact same results from each camera........Also realize that the DVC30 only shoots interlaced, so you cannot shoot progressive with the DVX100 and have the footage look the same from camera to camera.
I have two DVC60s which are basically the full size form factor of the DVC30 and I have been happy with the results using scene file 1 (regular interlaced DV) on the DVX100 and also scene file 1 on the others. It looks so close that even I have a hard time telling which camera shot what. Unfortunately, the DVC 30/60 can't do 24P and the DVX100 can't do the filmlook mode which I really like so I have to use regular DV mode in order to make them match.
Hope that helps some.