Digital point has a ranking of 952 and w3schools has a ranking of 792. Why do you think w3schools is better?
It doesn't mean that W3Schools is better, merely that proportionaly more visitors visit them with an Alexa toolbar than Digital Point. It could be because anyone who uses Digital Point probably uses FireFox (or other alternative browsers), which doesn't have the whole Alexa tracker ability, and those who visit W3Schools do so to learn brand new skills could be new to the internet, and still use IE with an Alexa toolbar installed.