In the Anapanasati Sutta, what is the difference between mind and mental processes? The book Breath by Breath by Larry Rosenberg splits the Anapanasati Sutta into 4 tetrads. The wildmind website does a similar thing. In the second tetrad there is a verse that is rendered


  He trains himself to breathe in sensitive to mental processes, and to
  breathe out sensitive to mental processes.


and in the third tetrad there is the verse


  He trains himself to breathe in sensitive to the mind, and to breathe
  out sensitive to the mind.


What is the difference between mental processes and the mind? In their English translations they look very similar. What is the original Pali words or phrases? Do they have difference translations or nuances that may make the differences clearer.
From the Anapanasati Sutta

&quot;Mindfulness of in-&amp;-out breathing, when developed &amp; pursued, is of great fruit, of great benefit. Mindfulness of in-&amp;-out breathing, when developed &amp; pursued, brings the four frames of reference to their culmination. The four frames of reference, when developed &amp; pursued, bring the seven factors for awakening to their culmination. The seven factors for awakening, when developed &amp; pursued, bring clear knowing &amp; release to their culmination.&quot;

The four tetrads correspond to The Four Frames of Reference referred to above. They are (in Pali and English):

Kāyānupassanā satipaṭṭhāna: being mindful of the body as a frame of reference.
Vedanānupassanā satipaṭṭhāna: being mindful of feelings as a frame of reference.
Cittānupassanā satipaṭṭhāna: being mindful of the mind as a frame of reference.
Dhammānupassanā satipaṭṭhāna: being mindful of mental qualities as a frame of reference.

So the second tetrad in your example is mindfulness of feelings (vedanā) and the third is mindfulness of mind (citta).
A basic distinction of these is here:

1: The Body merely as a transient and compounded Form..
2: Feelings just as vanishing Reactions to sense-contact..
3: Mind only as a group of habitual and conditioned Moods..
4: All Phenomena (dhamma) simply as discrete momentary Mental States..