What is the difference between a cula sotapanna and 'faith follower' ? I have read in many places about Cula Sotapanna or 'Lesser Sotapanna' and 'Faith Follower'. Are they the same or different? Do both of them attain to Sotapatti phala in the same lifetime?
Definition of Faith follower and the timing of his attaining of stream-entry can be found in SN 25.1


  One who has conviction &amp; belief that these phenomena are this way is called a faith-follower: one who has entered the orderliness of rightness, entered the plane of people of integrity, transcended the plane of the run-of-the-mill. He is incapable of doing any deed by which he might be reborn in hell, in the animal womb, or in the realm of hungry shades. He is incapable of passing away until he has realized the fruit of stream-entry.


About Cula-Sotapanna, Piya Tan's comment on SN 55.24


  The Buddha goes on to list six categories of persons who are assured of liberation, namely:
  
  (1) arhats,
  (2) non-returners,
  (3) once-returnres
  (4) stream-winners,
  (5) [truth-followers] those who accept the Dharma only after pondering over it with wisdom
  (dhammā paññāya mattaso nijjhānaṃ khamanti) who do not have quick and sharp wisdom
  and have not attained complete release, but who do possess the five faculties (pañc'indriyani)
  of faith, energy, mindfulness, concentration and wisdom [sutta §11]; and
  (6) [faith-followers] those who only possess the five faculties but who have mere faith (saddhā,matta) in and mere love (pema,matta) for the Buddha.
  
  The elder monks of old (poraṇaka thera) call such spiritually developed persons like (5) and (6) as "lesser 
  stream-winners" (cūḷa,sotāpanna) or "maturing stream-winner" (bala,sotāpanna).