This paper concentrates on the use of bilateral comparison between two spatially separated gas sensors arrays for the navigation of a robot in a turbulent odor plume. We propose binary or analog navigation laws depending on the nature of the available sensory information: in the binary case, only the side of the highest concentration is known, while in the analog case the graded concentration levels at both sides are known. To insure their efficiency we impose a stability condition and a convergence condition. The proposed laws are then simulated and tested experimentally with a robot in the case of a turbulent odor plume.