Hi, the LS is more comfortable. I'm not concerned about the mileage. We are driving from Palm Beach, FL to Plano, Tx then to Omaha and back to Plano. Eventually we will return to Palm Beach. My Lexus buddies tell me that at 83K miles the LS is just being broken in. I'm still on the original brake pads. My 2001 GS 300 is still going strong at 100K. I sold it to a buddy of mine.