Well, no one can be right when it comes to taste. But I prefer broccoli raab (which I know as "rapini"). American broccoli was developed to emphasize the flowerets. The result is a stalk that must be peeled to be eaten, and fairly inedible leaves. I avoid this stuff like the plague. Broccoli raab has a much deeper and wider range of flavours, including bitter, something bread out of American broccoli. Chinese broccoli is nice as well.

A simple way to see if you like broccoli raab (rapini):
Saute it in extra virgin olive oil until tender. Sear it a bit at high heat, if you'd like. A bit of salt and fresh black pepper. Dress it with a bit of good balsamic vinegar and a bit more raw extra virgin olive oil. Serve on top of rice or with a pasta dish.