Wow a 152 and PA28 ? pretty sure they need separate type ratings ?
NZ doesn't have SEP etc. each and every 'difference' is a new type rating, e.g. I needed two type ratings for a C-152 with manual flap ( i.e. you pulled the handbrake type lever ) and then one with an electric selector, then two ratings for a PA 28 140 HP and the next one with 180 HP engine ( different 'power plant')