Iâm guessing that the DBZ crew can form their ki to create either a ball or beam attack of the same named attack. Look at the Kame torpedoes, they are a Kame but they are in a ball form. Look at when Cell fires a Kame at Gohan and Gohan fires one back. Cells beam was attacked when he fired it but after gohan threw his out, Cellâs was no longer attached, it was in a ball form.
During the ending of the namek saga Krillin was standing in the ocean and performed a Kame into the water. It was not attacked or in a beam form, it appeared to be in a ball form, or so I can only assume because it wasnât attached, it just pushed the waves back.
During the fight between Freeza and Gohan after Gohan knocked Freeza to the ground, Gohan performed a rezoku and then sits there charging up an attack above his head. Finally Gohan has the attack charged to its max and then he releases it in a ball form but he says Masenko and throws it.
With all that said Iâm guessing there attacks can be a ball or beam, its their choice.