Sharan, it's not a distinction that matters too much to you. It's about my weather and lifestyle vs. my style preferences.
Technically, perhaps all short boots are "booties."
But for my non-stop walking lifestyle in a city where slush, ice, snow, and a mixture of those with salt and grit are a fact of life for at least 5 months a year, and where casual dress is the environmental norm, the pretty booties (relatively thin soled, delicate leather or suede) that would work wonderfully, even in this city, if I drove to work and had an office job, languish in my closet without a single wear. Whereas a more rugged boot will be worn and worn often.
My style preference is for more refined footwear, but my life dictates otherwise.