The endless line is more compact than a drum (to optimize the luff length) and has the advantage of having a larger maneuvering Ø to provide less torque effort (prevent from line overlapping). However, you need a deck plan suitable for the passage of continuous rope.
To prevent the sail from rolling out, you will need to make sure that you have tensioned the furling line.
A classic drum simplifies the deck plan, and above all secures the sail better in the furled position (only one cleat to operate). However, make sure that the storage capacity of the drum is sufficient to be able to completely furl your sail.