Here's a little more info about the 270SE. In 98 when the narrow 270 was renamed the 270 SE, they removed a lot of previously standard equipment. SeaRay wanted the 270 SE to compete with cheaper boats of the same size.
In 97, the standard engine was the 7.4. In 98, the SE model came standard with the 5.7. The removed a deck hatch, standard head became a port-a-potty, etc. There's a whole lot more equipment that was standard in 97 and became optional in 98.