The benefit of contract to hire roles is the trial period. Which gives you an opportunity to try out a candidate in a role prior to making a commitment.
Maybe the fit isn't right or level of expertise is lacking. No problem, you are able to acquire another resource and no added expense.
Pay & benefits are always a key part of the hiring decision. Contract to high roles are typically very cost effective and cheaper than starting off with a full-time employee.
If the need changes during the contract period there are no obligations to keep the employee staffed. You simply terminate the contract with the employee.