Matching in the Header vs Recipient

If I want a recipe done for a particular recipient ex:

COOKIELOCK = /tmp/iwannacookie
:0:$COOKIELOCK
* ^To: .* (cookiemonster(_at_)mydomain)
| foo > foobar ; 

Is it safer to do:

* H ?? (cookiemonster(_at_)mydomain)
| foo > foobar ; 

I want to get messages to cookiemonster in both
To: and CC: field.

Jacques G.
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