do you mean OSC could some headers in the bundles for exemple?
or multiple messages could be send in the same bundles? ...
otherwise from what Kevin wrote a difference could that OSC could be used in different softwre to communicate with each others and netsend/receive is only for PD... right?

cheers

juto

osc is not really bound to udp, although (unfortunately) most
implementation just use udp.

pd's netsend/netreceive protocol is sending data in plain text, while
osc adds some type information and can join several messages into
bundles, which are processed at once ... 

hth ... tim

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