I agree with most here, being PMP and PgMP. I skipped PfMP after I read the standard and was disappointed as it would not have helped me in my role as a PfM.
There are 1,5 million PMPs globally and less than 10K PgMPs and PfMPs each. I see PMP as a more general certification recognized by many non-project managers, those who hire you, listen to you and ask for your expertise.
PgMP certification was much more challenging, and the difference between programs and projects is less understood and practiced. In the market, it is seen as a specialist credential. I assume it is the same for PfMP.