see
here for buying guide
150 has a front mounted intercooler, different turbo, climate control, sport suspension and the horrid wood trim, remaps to 190bhp ish
130 has a side mounted intercooler, smaller turbo, black trim and AC as standard. rempas to 170-180 bhp ish
best place for a remap is R-Tech
also you want to have at least a grand in savings for when parts break
