move statement is more effienet than move-corresponding.
In case of dialog programming move/movecorresponding stsmt
are used to put internal table workarea data into screen fields.
data: begin of itab occurs 0,
lifnr like lfa1-lifnr,
name1 like lfa1-name1,
ort01 like lfa1-ort01,
end of itab.(here lfa1 is DBtable name)
:
:   
* in case of movecorresponding  

Move-Corresponding itab to lfa1.
(here:lfa1 is screen fields name).

* in case of MOVE stmt.

Move itab-lifnr to lfa1-lifnr.
Move itab-name1 to lfa1-name1.
Move itab-ort01 to lfa1-ort01.

Movecorresponding :
If DBtable having 1000 fields and you are using
movecorresponding, then system has to check all the field in
table to move.

move-corresponding is the one used to move internal body
work area to screen fields.

move-corresponding itab to lfa1.

where as move statement is used to move field by field from
internal body to screen fields.

move : itab-lifnr = lfa1-lifnr.

Move is used to data transfer  between the same structure
but move-corresponding data transfer between two structure
if both have some common fields