What is the different between Nirodha Samapatti and Phala Samapatti? What is the different between Nirodha Samapatti and Phala Samapatti? Are they the same? What are the distinctions between them?
Phalasamapatti is a meditative state in which a person is absorbed in Nibbana itself. In this attainment there is a special kind of consciousness present called Lokuttara-citta.

In contrast to this, in Nirodhasamapatti there is no consciousness at all. In Chapter 8 section 42 of the Abhidhammatha Sangaha it describes it like this:


  Having proceeded, thus, up to the base of nothingness, one then
  attends to the  preliminary duties such as the resolution, etc., and
  enters the base of neither-perception- nor-nonperception.    After 
  two  occasions  of  javana  in  absorption,  the  continuum  of 
  consciousness  is  suspended.    Then,  one  is  said  to  have 
  attained  cessation  (nirodha- samāpatti).


Another difference is in who can attain them. Phalasamapatti is attained by each of the four kinds of noble beings just after attaining the knowledge of the path, and it can be cultivated and extended by them as well. Nirodhasamapatti however, can only be entered by non-returners and arahats.