Are you meaning the shape that the smaller tyre would take on, on the rim, would mean more contact with the road than the 32?
You'd run lower pressures in the 32, less rolling resistance on imperfect surfaces.
@Emyr started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Are you meaning the shape that the smaller tyre would take on, on the rim, would mean more contact with the road than the 32?