XML: Pro's and Con's of the Method's "with 2" and "without 2"

Hello Community,

it is the first time to work with XML for me.

I started to read the www.example-code.com website and the Reference Documentation ( http://www.chilkatsoft.com/refdoc/vbnetXmlRef.html ).

My first big question overall:

What are the Pro's and Con's of the method's "with 2" and "without a 2 ". For example:

-GetNthChildWithTag ()

-GetNthChildWithTag2() <-Updates the calling object's internal reference to the Nth child node having a specific tag.

Grez