In truth, as far as the basic layout (shafts, etc.) go, it's identical. Most likely, it's been made stronger and more robust (in order to handle the increased loads). The same input shafts (the odd gears being on a shaft concentric with the hollow shaft for the even gears) are present; with gears 3 and 5, 4 and 6, 2 and reverse each having a shared pinion (input) gear (for example, fourth and sixth have ratios 42:37 and 30:37, respectively). This is also a Feature of the Ferrari 458, 458 Speciale, LaFerrari, California T, Ferrari F12, and Mercedes SLS transmissions (they are all basically the same unit, the Getrag 7DCL750).
There are still two output shafts (mainshafts), one with the gear wheels for gears 2,5,6,7 and the other with rear wheels R,1,3,4. These output shafts then power the final drive shaft (through a shared gear wheel, in this example 41 teeth) which contains the pinion for the 35:8 (4.375:1) spiral bevel gear.
tl,dr: All that's changed are the actual ratios and the robustness of the gearbox.
I posted an image earlier in this thread which might help you out. If you'd like, I can post the ratio lists for the 458, F12, etc. gearboxes as well.
In terms of layout, this transmission is virtually identical to the one used in modern McLarens (P1, 675 LT, 570 S, MP4-12C, etc.). In addition, this transmission also has a lot in common with the DL800 (the unit found in the Lamborghini Huracán and Audi R8 S Tronic). I have full ratio lists for these as well if anyone's interested.