The exhaust is going to be different. The ARB's different to fit round the haldex gear. The ESP/ABS needs to be recoded and some different parts possibly.
New fuel tank to fit round the cut up boot. 
Rear needs haldex controller and reader diff /diff carrier with left and right drivesharts and hubs and rear subframe. Front needs the transfer box propshafts and mountings for propshaft but not necessarily a different gearbox. 
and haldex loom too going to ECU.