For the blue car, it is hard to believe that it has only 75K miles. The engine, instrument cluster, and interior shows that it probably has more miles than that. The red one with 155K miles looks more like it has the correct miles on the odometer. Notice that the engine and the interior looks much better than the blue one. But, in reality for the buyer, nothing beats going and see the car yourself - especially armed with info on how a low miles car show look like.