Guessing no one knows the answer?
Just spent a couple hours searching and piecing information together. Most of it coming from several flight forums, along with Traxxas forums.
Finding a lot of information going back and forth, mostly positive info stating that running two different size batteries is actually okay. They average themselves out and you drive accordingly to the lower MAH rating.
Although my limited experience shows they run into their LVC at the same time. With this being said, my best educated guess is the lowers rated 'C' pack will drag down the performance of the nicer pack. Therefore, rather than having a 160amp burst and 200amp continuous available. The nicer pack will now only use up to 160amps as needed when the other pack does so as well. Also, the MAH rating is only going to be rated what ever the lowest pack is rated, but as stated earlier, they hit LVC at the same time.
Any further input?