My preference is for a roller shutter door, as it gives more headroom inside the garage. With the roller door open, the only area with limited headroom is below the rolled door, just inside the doorway. In addition, the headroom in the doorway can be higher than a sectional door, as the sectional door normally sits below the frame, whereas the roller can sit level with the frame. If the construction above the doorway is self-supporting, not held up by the frame, the frame can be left out, although I would suggest that the doorway be dimensioned to take a standard door frame, to cover any future change. Leaving out the frame also gives extra width on the doorway.
If you decide to go for a roller door, check the build details of your new garage, as the roller door is fitted on the inside face of the doorway and needs a defined mounting height above it for the roller mechanism, in addition to a defined width at each side for the tracks. The dimensions depend on the actual door chosen.
You can find a few more details on the website of garagedoorsonline.co.uk, on the General Information/Installation page, where they have a Sectional v Roller page.
My only connection with garagedoorsonline is as a satisfied roller door customer.