dear angle,
I have seen many Erb´s and only a few Klumpke´s. Treatment is not really that different, it depends on the childs specialist, the treatment he-she gives , the country, the possibilities for rehab etc etc. It does vary per country.
The guidelines in the following article could be of some help.
http://www.ubpn.org/awareness/A2002storment.pdf
hope it is of some help to you.
kind regards
esther