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Hi Shiva,
Dear 
First of all purpose are different 

Shiva """"already has columns for region and mentions cities""""
Region represents geographical region of india not state and city

Purpose  to provide the link to user to the  geographical termpage of india 

Structure 

Climate  Climate · Climatic regions 
Geology  Geology · Geological history 
Landforms Mountains · Glaciers · Volcanoes · Valleys · Rivers · Lakes · Desert · Islands · Extreme Points · Waterfalls · Beaches
Plains (Gangetic Plains · Eastern coastal · Western coastal) 
Regions  North India  · North-East India  · East India · South India  · West India · Central India 
Subdivisions  States and territories · Cities · Districts · Autonomous regions · Municipalities 
Environment Ecoregions · Sanctuaries · National Parks  · Biosphere Reserves · Protected Areas · Wildlife · Fauna · Flora 

Purpose  to provide the link to user to the geography page of state 

Structure

States  Andhra Pradesh · Arunachal Pradesh · Assam · Bihar · Chhattisgarh · Goa · Gujarat · Haryana · Himachal Pradesh · Jammu and Kashmir · Jharkhand · Karnataka · Kerala · Madhya Pradesh · Maharashtra · Manipur · Meghalaya · Mizoram · Nagaland · Orissa · Punjab · Rajasthan · Sikkim · Tamil Nadu · Tripura · Uttar Pradesh · Uttarakhand · West Bengal 
 
NCT  Delhi 
 
Territories  Andaman and Nicobar Islands · Chandigarh · Dadra and Nagar Haveli · Daman and Diu · Lakshadweep · Puducherry 
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