They dont look any different to our buffalo (except the horn shape is slightly different). I dont think all the wild buffalo from Assam all have that upwards sweeping horn shape???

Marrakai should be able to shed more light on this - he has got the book about the old hunting records from Assam (cant rember the name) and it has photos in it that show different horn shapes of the wild buffalo there (when there were heaps of them).

Cheers Matt