xtd and xsd format

Hi everyone,

I measured the distance of H2O after geometry optimization and I have 2 question.

1. why distances are different in xsd and xtd format?

2. H2o is an adsorbate in my project and I want to do adsorption of H2O on adsorbate. Due to difference of distance in these 2 format, which format is correct for pasting optimal H2O in the adsorbent window?