fnd_stats or dbms_stats

 Hi All,

I have one doubt.

We have oracle apps database. Usually we used to run fnd_stats on seeded oracle apps tables like (gl_ge_lines,oe_order_lines_all etc.). and dbms_stats on custom tables. Suppose, i copied seeded apps tables  via CTAS or imp/exp into custom schema.

so, what i have to run, fnd_stats or dbms_stats? if fnd_stats, then how oracle apps decide on data? If dbms_stats why?

What will be the impact if run fnd_stats on custom table which is created.

This is doubt which i want to clear.