Which is faster to fill-out: Paper or digital forms? [closed]

We are wondering which of the two are faster to fill out for walk-in customers who wants to sign-up for a class.

PAPER:

Pros: Forms can be distributed to many customers and they can fill this out simultaneously.

Cons: What's written on paper needs to be re-entered by the staff into the system. May be less legible.

DIGITAL:

Pros: Whatever the user inputs is already entered into the system. Highly legible.

Cons: There can only be 1-2 terminals / iPads so customers cannot sign-up simultaneously. Unlike in paper format.

I'm not sure which is more efficient. I'm asking this because we'd like the signing-up process for walk-in classes to have a shorter waiting time / shorter queues and to make it less taxing for the administrator too.