Tube end forming refers to a number of processes that require specialized tools, but no matter which process you are using the tube end forming machinery you use needs to be up to the task.
Which type of tube end forming machine is right for a given application often comes down to the applications specific requirements. For instance, a high-volume, simple end forming process that doesn't require a great degree of expansion or reduction would probably benefit from the fast cycle times and straight forward end forming of a single strike end former.
For applications where the expansion or reduction that is needed is extreme, the end forming is complicated, or you needed to perform many types of end forming a multi-strike tube end forming machine might be a better option.
Your best bet is to gather your specifications and reach out directly to the supplier for help in determining which type of tube end forming machinery is right for your application.