As far a I'm concerned, a Dutch Oven is as much a slow cooker as a crock pot, but better.
You can brown AND cook in the same pot.
It doesn't need a bunch of water added to work.
It goes on the stove top AND in the oven, and heats evenly in either one.
The porcelain coated ones are easy to clean.
They take up less room than an appliance.
They look cool enough to serve from.
I agree. I have both and have used both for the same recipe.
I’m a bit ticked at the crappy quality of crockpots these days (I’m on #3 in 4 years) and they have hot spots. My ceramic-coated Dutch Oven is superior, imho.