I think the TF 107 will not have nay difference to its predecessor at all apart from addition of new wings.(or less wings?) But then again I can be wrong, but as you can see it, the TF 106 that completed the 2006 season barely had any changes compared to the TF 105B. So I expect the car will not have a big difference.
But I'm very curious about the engine, the engine was down on power this year, the engine block is light and has a potential advantage in performance but a risk in reliability. And the it ran revs which are far lower revs than the other teams. So I reckon they will not be very competitive in 2007.