Though it wears a Mazda logo,the Tribute is actually the identical twin of the Ford Escape. A Mazda-built 2.3-liter four-cylinder engine and a Ford-built 3.0-liter V6 are common to both the Escape and Tribute,as are the transmissions,drivetrains and most interior parts. Mazda adds its own touches,however,with a sporty front-end treatment and raised side panel cladding. Though it rides on a platform that is beginning to show its age,the Tribute remains highly competitive with other compact SUVs,offering a high content level,a spacious rear seat and the choice between front-wheel and four-wheel drive. There is even a hybrid model in the line-up,an appealing choice for those trying to help save fuel and the environment.