The level of experience is far more important than the particular
specialty.  Both specialties existed long before the modern age of
osseointegrated implants, and both specialties have fairly equivalent
training with regard to implant placement.
    I may get hung for saying this, but in my experience oral surgeons are
less timid about cases that aren't slam dunks.  This may be because they
generally have more experience in the areas beyond the
alveolus--sinuses, working around inferior alveolar nerves, etc.  OTOH,
periodontists are more acquainted dealing with issues like tissue
contour and esthetics. They have worked longer together with restorative
dentists in designing appropriate fixed prostheses.  For this reason, I
have had fewer problems with periodontists placing implants in areas
that are difficult to restore esthetically.
    These are gross generalizations of course, and not terribly useful in
selecting a surgeon.  But I would talk with your restorative dentist,
who will surely have knowledge of the surgeons available, and can advise
you.

Steve

I had tooth #18 extracted and am scheduled for evaluation in a month
with the  oral surgeon to see how the bone has healed. If there is bone
loss, bone graft will be required (I am not sure if the oral surgeon
does bone grafts -- I will need to go to periodontist -- but I will
have to check on that).

But I do know that both the oral surgeon and the periodontist that
previously treated my infection, perform implants.

In the case that I go for implant, does it make much difference which
one of them I select?

Is experience very important or are implants a routine procedure that
any experienced dentist could do?