Start Process Smart service Vs User Input task

These are different things entirely (apples versus oranges!). What is the context for your question?

Let me help you get started perhaps:

• the 'Start Process smart service' is a 'smart service' (i.e. a node in an Appian process model) that starts an instance of a process model
• the 'User input task' is also a 'smart service' that creates a task for a User to provide some input
• a 'User input task' always has to be in a process model
• not all process models have 'User input tasks'

Let me help you get started perhaps:

• the 'Start Process smart service' is a 'smart service' (i.e. a node in an Appian process model) that starts an instance of a process model
• the 'User input task' is also a 'smart service' that creates a task for a User to provide some input
• a 'User input task' always has to be in a process model
• not all process models have 'User input tasks'