Confused...

I'm trying to understand the difference but so far I can't.
I know the difference between Kodama, Hikari and Nozomi, the normal shinkansen as I call them.
But this time I will go to Hokkaido and they have different names, Hayate and Hayabusa. From what I read...and understood, Hayabusa is faster.
Still it's confusing to me.

Well well it will probably get clearer later, but for now I have concentrate on my studies.
(T_T)