Just want to share u the website describe technically different this 2 type of engine....for those thinking how B16B hv more 15hp than B16A this is quite usefull link.
The link is : Type R
B16B has identical low and mid range power as B16A, but B16B hv more power after 7k rpm. B16B is very syok to tarik one. Btw in daily usage B16B is same performance with B16A.