Depreciation rates under Companies act is minimum rates prescribed
Depreciation under Income tax is maximum rates allowable
Naturally if we follow the rates prescribed by the act WDV under companies act always greater then WDV under Income tax.
But incase if you providing depreciation under companies act more then the Income tax act (since maximum rates not given in companies act)so that time it will be more then the WDV under Income tax
Also where the assets below Rs.5000 it can be taken 100% depreciation under companies act, but Income tax no such provision such cases WDV under Income tax is higher