TD5 Differentials Synthetic oil

[assafde]

Hi Guys,

While Land Rover differential stock lubricant says:
"Multigear Texaco 75W90R" semi synt into the diff's

Is it better to go with:
Mobil 1 Synthetic Gear Lubricant LS 75W-90 (http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil1_Synthetic_Gear_Lubricant_LS_75W-90.asp)

Or it can harm any metals inside the diff due to oil additives?

[assafde]

Update information
Maintenance Fluid Specifications for "Legacy" Land Rover Vehicles (http://jimsrover.afraid.org/rover/Technical%20Bulletins/Maintenance/Maintenance%20Fluid%20Specifications%20for%20Legac y%20LR%20Vehicles.pdf)