The Indian prefolds are made from Indian cotton, which is softer and fluffier than the cotton used in Chinese prefolds. Unbleached is always softer than bleached. If you compare unbleached Indian prefolds to bleached Chinese prefolds, there is a very noticable difference. The unbleached Indian prefolds are softer and more absorbent.
I think it's more difficult to tell the difference between bleached Indian prefolds and bleached Chinese prefolds, although the Indian ones may be a tad softer. Some people feel the Chinese prefolds last longer because the serging is more heavy duty. But others feel the Indian prefolds last longer because the cotton hasn't been subjected to harsh bleach. HTH!