If it's based on the Titan, then it must have a frame, which I would be OK with! Like I said, I don't know much about the 2 vehicles you talked about...
If Porsche made something with a truck frame under it, I sure did miss it! Then again, any Porsche that's not a 356, 911, 930/935 or 912 (my dad had a 912, so there's some sentiment there), I don't have much interest in, except maybe the 917 race car from the '70s. A Porsche towing something.. that just doesn't seem right to me! Oh the sacrilidge! :)
