Wide-Body
"As you know dissimilar formation can be tough, but it is also so much fun"
Absolutely, it's rare that I get to do similar type! But that's with leaders who are extremely experienced in that kind of formation which helps. For air-to-air, having a similar lead means the camera ship can be flown more steadily and the subject can position more accurately on command.
As for dissimilar type fun, it's definitely fun! But that's cos it's hard
Anyway, the OP has his mount, so all's sorted. It would be great to see the pics once they're done.