So what you mean is that Apple's HomePod sounds better than Amazon's Echo speaker that costs about a third of the price, assuming you also have the additional hardware (e.g. iPad, iPhone, Mac) necessary to get music to play on the HomePod in the first place.
As long as we're going to be pedantic, HomePod can stream music directly from Apple Music over the internet without requiring another device.
I imagine it will work much the same on the Alexa speakers.