Multiple Checkout Forms in Woocommerce

is it possible to have different checkout forms in Woocommerce?

Let make myself clear. I use woocommerce for registration for events. This event could be for free and for some of them you need to pay. I would make a form that is relative on the product (in this case event-ticket) that you buy. Incase: for a “free event” I need a simple checkout form with less fields, for a “buy event” I want to ask more fields in the checkout. Does anyone have an idea to achieve this?

Some other solutions with the same result are welcome!