I would say both are same yet completely different in terms of landscape, culture and adventure. Spiti is still untouched and less-visited as compared to Ladakh region in Jammu & Kashmir. I went to Ladakh first and then Spiti. Go to any place but travel responsibly, that's it!
Hey Sidharth, Go for spiti. its gives a better picturesque view. Also less touristy and untouched. You can have more interaction with locals. And unlike Leh you can visit spiti even in winters as the roads will not be closed. If not visit both ????. Hope this helps Happy travelling Rashmi
If you want peace and real humanity. So you should vist spiti and if you want to know more go to my channel on youtube- Raoming Rider
Link
http://www.youtube.com/roamingrider
I think there's not much difference in them. Spiti is called the sister valley of ladakh. Both the places have no greenery but only mountains. But you have couple of places around leh in the radius of 150 kms that are worth to watch. Also you can cover many famous Passes while going to leh.
Oh.. it's a tough question I think.. if you are seeking peace of mind go for spity.. and get mesmerised by the enchanting beauty.. try to explore the remote villages near spity like mudh, hikkim -where the world's highest post office located.when you are going there please brought some chocolates and give it to the chubby cheeks over there.. their innocent smiles are the precious gifts that you get from your trip.. thank you.. ????