Brewology

k im new to the cfw thing, in new to everything that comes to hacking, i made the pandora battery muh self and made the magic memory stick... probably all easy... but i wanna learn other stuf when it comes to the psp and make homebrew, im a quick learner so it would be cool if sum one could teach me sum stuff. thanks
wats the diff between the different cfw's

Different custom firmwares have the same differences as regular firmware.
With each update comes new features.
Sometimes a custom firmware like 5.00 M33-2 will be updated to 5.00 M33-3.
It doesn't add features, it just fixes problems within the firmware itself that the coder found.
Sometimes when Sony updates the PSP with really small numbers, like 3.5 to 3.51 and then to 3.52, they're just fixing small problems they find too instead of using a different number at the end like in 5.00 M33-3.