I'm not familiar with your specific plane, but a "trainer" is designed to make it easier to learn. They fly slower, and have a large, flat-bottom wing mounted above the fuselage, with significant dihederal to make it very stable, and self-righting.

Most "sport" planes are a low-wing design (under fuselage), with either a semi-symetrical or a fully-symetrical wing for more acrobatic performance. They also fly faster, and are less forgiving to pilot errors, making it more difficult to learn with.

<edit> I just looked up the Pilatus PC 9 - That plane would be a difficult plane to learn on (impossible for many)... It looks like it was designed specifically for acrobatics.