I have a B1 injector and I love it. I opted for the injector for the wider variety of glass bowls and more restrictive airflow which is purely a personal preference. It was a 4/29 bundle package.
That being said a ball vape is really just a hot coil heating some glass balls so they heat the air when you pull. There are some variables here based on designs but it's almost like asking which is the best stove to cook on.
If you are looking to get rid of the torch it's a great decision. There's nothing like setting the heat controller to 3 hours loading a bowl and having an on demand cloud factory for the direction of a movie and then some.