OK, so we've got three answers so far: it's the same, it's different but easy, and it's different and terrible.
For what it's worth, all I'd load is light trap loads. (Sure--just like I was going to load only .45ACP way back when....)
I agree mostly with RC's answer.
Shot shell loading is easier as there is virtually no shell prep. Take the fired shell and feed it into the machine. Shoot and reload it until it starts to split, usually in the crimp area but not always.
It is more difficult because the shell goes through more steps than a metallic cartridge. Resize and deprime, prime, charge, insert wad, drop shot charge, and two crimp steps.
There is no working up of loads. Follow the recipes. But, look up different sources of information and a recipe with components you want might be there.
I agree with ReloaderFred, shot shell loading is kind of a mindless task.
I agree with lightman, you are not a shot shell loader until you dump a hopper full of shot. It is not if, but when.
Empty hulls are most frequently available by shooting new shells. There are some sources of fired hulls and some new hulls on the market. When you buy shell for a source of hulls, spend the bucks on the good ones, they last longer.
Even though my shot shell shooting is way down, I still reload shot shells instead of buying new.