Different results when validating by URI or Direct Input

Hello,

I´m getting different results when I´m validating my website by direct input
and by URI. When I copy/paste the html source it validates fine but when I
enter the URI I get (some) errors.

Are the different validation methods using different code for the
validation?

The URI I´m testing is:
<http://www.genteycasas.com/es-co/product/terms-of-use>
http://www.genteycasas.com/es-co/product/terms-of-use

Kind regards

Andreas Gomm

NOTE: Whenever possible, give the address of the document you were checking.