Well, there's no big difference between Gold and Original amla oils. However, this one's much more suitable for those with lighter hair (blonde, light brown..) or those with dyed hair because it doesn't really affect the hair color.
Dabur Amla original oil darkens the hair visibly, but Dabur Amla Gold provides all the hydrating and strengthening benefits of Amla without affecting the hair color.
Another major plus that Gold has over the original is the smell. This one doesn't stink, it actually smells good (well at least I think so.)