Well they had created Indian Version of this International Show which ultimately ruined the whole thing. Clips shown were same but Manish Paul did anchoring and voiceover for desi adaption. Original English progr hosted by Richard Hammond is still quite good.
Nat Geo still is better than Discovery. They have aired good science based shows like Do or Die, The Big Picture with Karl Penn, Street Genius, Brain Games, How to lick your elbow etc. but nowadays just repeating its old episodes instead of bringing fresh season. Possible reason is dismal ratings they r getting hence resorting to this cost cutting strategy. Discovery has a separate science channel which launched in 2010 here , during initial years they aired interesting latest programs but now they r back to showing recycled or dated content.
Apart from this Nat Geo keeps on telecasting latest productions like Pluto, Valley Of Bloom, Surviving Picasso, One Strange Rock, Before The Floods,,Story of Us, Story of God, Banged Up Abroad, Outbreak, The Great Indian Train Journeys etc. Also they produce Indian Content like Megakitchens , Icons etc. but again as i have said Indian Audiences r not mature enough to understand and appreciate such content.
In the end Discovery sticks to Bear Grylls, Nat Geo is forced to air repeat content, History TV18 airs few selected shows and those who love watching differentiated content are at loss. Have hopes from Sony BBC that they do not follow the same and instead add more channels to their infotainment, entertainment, kids bouquet