My setup is somewhat different than yours (VF35/VC25) and the mismatch is very noticeable Im running the speakers with a Yammy RX-V663,and no matter what I do there is no way I can have a seamless front stage.
Last week I spoke with a rep and he told me that the center is for handling human voices and that is its function so they made it to make speech more intelligible,well that is good as long the CC don't handle other sounds but the CC on movies handle more than voices,I think that is a wrong approach from Klipsch because fronstage should sound the same Left Right & Center.
I was decided to go the bottom of the issue and opened both CC and one tower and discovered that eventhough both use same drivers the crossover on both speakers is different(diferent values on the components),I called them and order the crossover network that uses the VF35 and Im planning to intall it on the CC to see if the problem of tonal mismatch dissapears.