The answer is more in affordability the vitamix is the best with the silicone lid and the hole in the middle for easy stirring as well as advanced features for all types of things like soup, smoothies, crushing, slushes and more. The cost is $500 but it’s high quality so it will last a long time.
The Ninja Blender is affordable at $100 but it will be very cheap and plastic lids I have already had trouble with mine being stubborn. It’s also not very easy to clean. It’s very loud as well which is why I don’t use it often.
I’m going to be upgrading to a Vitamix this year for sure I’m sick of working with my stubborn Ninja Blender. But not everyone can afford the best of everything which is why it’s a good starter blender.