Transform or Rigidbody?

I am creating a 3D game in which players move quickly in straight lines on a 2D grid (similar to tron lightbike style games). The players will not be involved in any physics interactions (except basic collision detection).

Minimizing position synchronization issues is a major concern for this fast paced game.
With PUN in mind, Is it ideal for me to move players using Rigidbody.velocity, or using transform.translate?