Difference between business and first class in fast trains

business class seat is the best class and then first class seat. There are 4 seats in each frow for first class, 2 seats on each side. For business class, there are 3 seats in each row, 2 on one side and the other one on the other side. The seats for business class are much better than first class. You can lay down and got some free snacks. But surely, the price is much higher, nearly doubled. You can se some photos on this website.

I did mean that first class seats are not comfortable, just for comparison, business class are even better