This paper presents a comparative study of two different FSCW PM machines for application as integrated motor-generator in hybrid vehicles. The first machine design contains the conventional concentrated winding with q=0.5 that is recently used in many hybrid systems for commercial vehicles, whereas the second machine use the new 18-teeth/10-poles concentrated winding with the optimized magneto motive force. Design and analysis of considered machines is based on their performances which included evaluation of electromagnetic torque and torque ripples, Ohmic losses, magnet losses, field weakening capability, noise analysis, and temperature behaviour. Using 2D and 3D finite elements the both machine types are investigated and compared under the same geometrical and electromagnetic constrains. Considering the main electromagnetic and thermal aspects, the new machine show high power capability and efficiency, low torque ripple, low magnet losses, noiseless design, and thermally robust.