P2s layer height difference to p1s

Hi,
does anyone know why the p1s has more layer height options than the p2s for each nozzle? For example the 0.4 nozzle on the p1s offers up to 0.28mm but the p2s only offers 0.24mm. When setting 0.28 manually I get a warning that the limit in printer settings is exceeded. Does anyone have any experience with that?
Thank you!